SELECT 
  cscart_product_descriptions.product_id, 
  cscart_product_descriptions.meta_keywords, 
  cscart_product_descriptions.meta_description, 
  cscart_product_descriptions.search_words, 
  cscart_product_descriptions.promo_text 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    8305, 10896, 12820, 9551, 6903, 7680, 
    6902, 10017, 12825, 6901, 9837, 9792, 
    12819, 9786, 10452, 10313, 9492, 9789, 
    8352, 9788, 8332, 8358, 8328, 8121, 
    12826
  ) 
  AND cscart_product_descriptions.lang_code = 'uk'

Query time 0.00076

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_product_descriptions",
          "access_type": "range",
          "possible_keys": ["PRIMARY", "product_id"],
          "key": "PRIMARY",
          "key_length": "9",
          "used_key_parts": ["product_id", "lang_code"],
          "rows": 25,
          "filtered": 100,
          "index_condition": "cscart_product_descriptions.product_id in (8305,10896,12820,9551,6903,7680,6902,10017,12825,6901,9837,9792,12819,9786,10452,10313,9492,9789,8352,9788,8332,8358,8328,8121,12826) and cscart_product_descriptions.lang_code = 'uk'"
        }
      }
    ]
  }
}