SELECT 
  cscart_product_descriptions.product_id, 
  cscart_product_descriptions.short_description, 
  IF(
    cscart_product_descriptions.short_description = '' 
    OR cscart_product_descriptions.short_description IS NULL, 
    cscart_product_descriptions.full_description, 
    ''
  ) AS full_description 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    92255, 92256, 92257, 92496, 92497, 92498, 
    92499, 91550, 91619, 91788, 91789, 
    91790, 91791, 91792, 91793, 91794, 
    91795, 92254, 92501, 92502, 92503, 
    92504, 92505, 92506, 92507, 92192, 
    92193, 92194, 92195, 92196, 92204, 
    92205, 92206, 92207, 92208, 92209, 
    92442, 92443, 92448, 92147, 92148, 
    92149, 92349, 92350, 92351, 92352, 
    85580, 92151
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00119

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "21.63"
    },
    "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": 48,
      "rows_produced_per_join": 48,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "16.83",
        "eval_cost": "4.80",
        "prefix_cost": "21.63",
        "data_read_per_join": "183K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`nuie_scalesta_net`.`cscart_product_descriptions`.`product_id` in (92255,92256,92257,92496,92497,92498,92499,91550,91619,91788,91789,91790,91791,91792,91793,91794,91795,92254,92501,92502,92503,92504,92505,92506,92507,92192,92193,92194,92195,92196,92204,92205,92206,92207,92208,92209,92442,92443,92448,92147,92148,92149,92349,92350,92351,92352,85580,92151)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}