SELECT 
  lang.name, 
  IF(
    cscart_ult_language_values.value IS NULL, 
    lang.value, cscart_ult_language_values.value
  ) as value 
FROM 
  cscart_language_values lang 
  LEFT JOIN cscart_ult_language_values ON cscart_ult_language_values.name = lang.name 
  AND company_id = 1 
  AND cscart_ult_language_values.lang_code = lang.lang_code 
WHERE 
  lang.lang_code = 'uk' 
  AND lang.name IN (
    'abt__ut2.sku_copy_status_success', 
    'abt__ut2.sku_copy_status_fail', 
    'copied', 'cannot_buy', 'no_products_selected', 
    'error_no_items_selected', 'delete_confirmation', 
    'text_required_group_product', 
    'save', 'notice', 'warning', 'error', 
    'text_are_you_sure_to_proceed', 
    'text_invalid_url', 'error_validator_email', 
    'error_validator_phone', 'error_validator_phone_mask', 
    'error_validator_phone_mask_with_phone', 
    'error_validator_phone_phone_number_with_country_selection', 
    'error_validator_integer', 'error_validator_multiple', 
    'error_validator_password', 'error_validator_required', 
    'error_validator_zipcode', 'error_validator_message', 
    'text_page_loading', 'error_ajax', 
    'text_changes_not_saved', 'text_data_changed', 
    'placing_order', 'order_was_not_placed', 
    'file_browser', 'browse', 'text_no_products_found', 
    'cookie_is_disabled', 'insert_image', 
    'image_url', 'loading', 'product_in_wishlist', 
    'product_added_to_cl', 'text_editing', 
    'save', 'cancel', 'abt__ut2.link_copied', 
    'abt__ut2.product_reviews.all_reviews', 
    'abt__ut2.product_reviews.customer_review', 
    'abt__ut2.product_reviews.photo_n_of', 
    'abt__ut2.sku_copy_status_success', 
    'abt__ut2.sku_copy_status_fail', 
    'copied', 'cannot_buy', 'no_products_selected', 
    'error_no_items_selected', 'delete_confirmation', 
    'text_required_group_product', 
    'save', 'notice', 'warning', 'error', 
    'text_are_you_sure_to_proceed', 
    'text_invalid_url', 'error_validator_email', 
    'error_validator_phone', 'error_validator_phone_mask', 
    'error_validator_phone_mask_with_phone', 
    'error_validator_phone_phone_number_with_country_selection', 
    'error_validator_integer', 'error_validator_multiple', 
    'error_validator_password', 'error_validator_required', 
    'error_validator_zipcode', 'error_validator_message', 
    'text_page_loading', 'error_ajax', 
    'text_changes_not_saved', 'text_data_changed', 
    'placing_order', 'order_was_not_placed', 
    'file_browser', 'browse', 'text_no_products_found', 
    'cookie_is_disabled', 'insert_image', 
    'image_url', 'loading', 'product_in_wishlist', 
    'product_added_to_cl', 'text_editing', 
    'save', 'cancel', 'abt__ut2.link_copied', 
    'abt__ut2.product_reviews.all_reviews', 
    'abt__ut2.product_reviews.customer_review', 
    'abt__ut2.product_reviews.photo_n_of'
  )

Query time 0.00698

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_ult_language_values",
          "access_type": "system",
          "possible_keys": ["PRIMARY"],
          "rows": 0,
          "filtered": 0,
          "const_row_not_found": true
        }
      },
      {
        "table": {
          "table_name": "lang",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "392",
          "used_key_parts": ["lang_code", "name"],
          "rows": 46,
          "filtered": 100,
          "index_condition": "lang.lang_code = 'uk' and lang.`name` in ('abt__ut2.sku_copy_status_success','abt__ut2.sku_copy_status_fail','copied','cannot_buy','no_products_selected','error_no_items_selected','delete_confirmation','text_required_group_product','save','notice','warning','error','text_are_you_sure_to_proceed','text_invalid_url','error_validator_email','error_validator_phone','error_validator_phone_mask','error_validator_phone_mask_with_phone','error_validator_phone_phone_number_with_country_selection','error_validator_integer','error_validator_multiple','error_validator_password','error_validator_required','error_validator_zipcode','error_validator_message','text_page_loading','error_ajax','text_changes_not_saved','text_data_changed','placing_order','order_was_not_placed','file_browser','browse','text_no_products_found','cookie_is_disabled','insert_image','image_url','loading','product_in_wishlist','product_added_to_cl','text_editing','save','cancel','abt__ut2.link_copied','abt__ut2.product_reviews.all_reviews','abt__ut2.product_reviews.customer_review','abt__ut2.product_reviews.photo_n_of','abt__ut2.sku_copy_status_success','abt__ut2.sku_copy_status_fail','copied','cannot_buy','no_products_selected','error_no_items_selected','delete_confirmation','text_required_group_product','save','notice','warning','error','text_are_you_sure_to_proceed','text_invalid_url','error_validator_email','error_validator_phone','error_validator_phone_mask','error_validator_phone_mask_with_phone','error_validator_phone_phone_number_with_country_selection','error_validator_integer','error_validator_multiple','error_validator_password','error_validator_required','error_validator_zipcode','error_validator_message','text_page_loading','error_ajax','text_changes_not_saved','text_data_changed','placing_order','order_was_not_placed','file_browser','browse','text_no_products_found','cookie_is_disabled','insert_image','image_url','loading','product_in_wishlist','product_added_to_cl','text_editing','save','cancel','abt__ut2.link_copied','abt__ut2.product_reviews.all_reviews','abt__ut2.product_reviews.customer_review','abt__ut2.product_reviews.photo_n_of')"
        }
      }
    ]
  }
}