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 (
    9551, 12820, 10896, 8305, 10313, 9789, 
    8328, 12819, 7680, 10017, 6903, 9492, 
    9786, 8332, 8352, 8358, 6902, 9837, 
    9792, 10452, 8121, 9788, 6901, 12826, 
    12825
  ) 
  AND cscart_product_descriptions.lang_code = 'uk'

Query time 0.00079

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 (9551,12820,10896,8305,10313,9789,8328,12819,7680,10017,6903,9492,9786,8332,8352,8358,6902,9837,9792,10452,8121,9788,6901,12826,12825) and cscart_product_descriptions.lang_code = 'uk'"
        }
      }
    ]
  }
}