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 (
    12050, 11644, 11070, 11069, 11068, 11067, 
    11066, 11065, 11064, 11063, 7173
  ) 
  AND cscart_product_descriptions.lang_code = 'uk'

Query time 0.00048

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": 11,
          "filtered": 100,
          "index_condition": "cscart_product_descriptions.product_id in (12050,11644,11070,11069,11068,11067,11066,11065,11064,11063,7173) and cscart_product_descriptions.lang_code = 'uk'"
        }
      }
    ]
  }
}