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 (
    1233005, 1233008, 1233011, 1233012, 
    1233004, 1233001, 1232994, 1232998, 
    1232999, 1233020, 1233022, 1238147, 
    1238155, 1238164, 1238132, 1238131, 
    1233023, 1238120, 1238126, 1232993, 
    1232979, 1232940, 1232935, 1232906, 
    1232897, 1232946, 1232908, 1232977, 
    1232975, 1232947, 1232971, 1232966, 
    1232953, 1232965, 1232973
  ) 
  AND cscart_product_descriptions.lang_code = 'ro'

Query time 0.00093

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "41.50"
    },
    "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": 35,
      "rows_produced_per_join": 35,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "38.01",
        "eval_cost": "3.50",
        "prefix_cost": "41.51",
        "data_read_per_join": "133K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "meta_keywords",
        "meta_description",
        "search_words",
        "promo_text"
      ],
      "attached_condition": "((`maniamall_cscart`.`cscart_product_descriptions`.`product_id` in (1233005,1233008,1233011,1233012,1233004,1233001,1232994,1232998,1232999,1233020,1233022,1238147,1238155,1238164,1238132,1238131,1233023,1238120,1238126,1232993,1232979,1232940,1232935,1232906,1232897,1232946,1232908,1232977,1232975,1232947,1232971,1232966,1232953,1232965,1232973)) and (`maniamall_cscart`.`cscart_product_descriptions`.`lang_code` = 'ro'))"
    }
  }
}

Result