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 (
    82554, 86232, 86233, 82559, 82552, 82564, 
    82568, 82572, 91976, 91984, 86809, 
    82558, 82413, 86337, 86336, 92555, 
    92558, 92559, 92593, 92594, 92595, 
    92596, 92840, 92841, 92842, 92843, 
    93071, 93072, 93073, 93074, 93075, 
    93076, 93077, 93515, 93516, 93517, 
    93518, 93519, 93520, 93521, 93522, 
    93894, 93895, 94023, 94064, 94065, 
    94066, 94067
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00105

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 (82554,86232,86233,82559,82552,82564,82568,82572,91976,91984,86809,82558,82413,86337,86336,92555,92558,92559,92593,92594,92595,92596,92840,92841,92842,92843,93071,93072,93073,93074,93075,93076,93077,93515,93516,93517,93518,93519,93520,93521,93522,93894,93895,94023,94064,94065,94066,94067)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}