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 (
    21567, 51083, 22715, 51082, 51085, 51081, 
    51088, 51087, 22713, 51086, 51089, 
    51090, 51092, 51093, 22714, 51091, 
    51095, 51096, 51097, 51098, 51100, 
    51099, 22716, 51103, 22712, 51105, 
    51102, 51101, 51123, 51122, 51121, 
    92, 49, 51129, 51128, 51127, 51126, 
    51125, 48, 51155, 51154, 51153, 51152, 
    21, 51158, 51157, 51156, 53, 51160, 
    51159, 51176, 51174, 51173, 51172, 
    91, 105, 50989, 46, 51370, 51371, 51372, 
    51373, 51452, 51453, 51496
  ) 
  AND cscart_product_descriptions.lang_code = 'ru'

Query time 0.00112

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "45.51"
    },
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "product_id"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id",
        "lang_code"
      ],
      "key_length": "9",
      "rows_examined_per_scan": 65,
      "rows_produced_per_join": 65,
      "filtered": "100.00",
      "index_condition": "((`test_uchur_k`.`cscart_product_descriptions`.`product_id` in (21567,51083,22715,51082,51085,51081,51088,51087,22713,51086,51089,51090,51092,51093,22714,51091,51095,51096,51097,51098,51100,51099,22716,51103,22712,51105,51102,51101,51123,51122,51121,92,49,51129,51128,51127,51126,51125,48,51155,51154,51153,51152,21,51158,51157,51156,53,51160,51159,51176,51174,51173,51172,91,105,50989,46,51370,51371,51372,51373,51452,51453,51496)) and (`test_uchur_k`.`cscart_product_descriptions`.`lang_code` = 'ru'))",
      "cost_info": {
        "read_cost": "39.01",
        "eval_cost": "6.50",
        "prefix_cost": "45.51",
        "data_read_per_join": "296K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "meta_keywords",
        "meta_description",
        "search_words",
        "promo_text"
      ]
    }
  }
}