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 (
    128, 51118, 51117, 51116, 51115, 51114, 
    51113, 51165, 51164, 51163, 51162, 
    51161, 52, 51183, 20, 51188, 51187, 
    51186, 51185, 51184, 51201, 51200, 
    51199, 51198, 51197, 51196, 51195, 
    131, 51231, 51230, 51229, 51228, 51227, 
    51226, 51225, 109, 51243, 51242, 51241, 
    51240, 51239, 36, 51253, 51252, 51251, 
    51250, 51249, 34, 51265, 51264, 51263, 
    51262, 51261, 51260, 51259, 110, 51273, 
    147, 51277, 51276, 51275, 51274, 51346, 
    118, 114, 84, 51352, 51351, 96
  ) 
  AND cscart_product_descriptions.lang_code = 'ru'

Query time 0.00135

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "48.31"
    },
    "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": 69,
      "rows_produced_per_join": 69,
      "filtered": "100.00",
      "index_condition": "((`test_uchur_k`.`cscart_product_descriptions`.`product_id` in (128,51118,51117,51116,51115,51114,51113,51165,51164,51163,51162,51161,52,51183,20,51188,51187,51186,51185,51184,51201,51200,51199,51198,51197,51196,51195,131,51231,51230,51229,51228,51227,51226,51225,109,51243,51242,51241,51240,51239,36,51253,51252,51251,51250,51249,34,51265,51264,51263,51262,51261,51260,51259,110,51273,147,51277,51276,51275,51274,51346,118,114,84,51352,51351,96)) and (`test_uchur_k`.`cscart_product_descriptions`.`lang_code` = 'ru'))",
      "cost_info": {
        "read_cost": "41.41",
        "eval_cost": "6.90",
        "prefix_cost": "48.31",
        "data_read_per_join": "314K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "meta_keywords",
        "meta_description",
        "search_words",
        "promo_text"
      ]
    }
  }
}