SELECT 
  product_descriptions.product_id, 
  product_descriptions.short_description, 
  IF(
    product_descriptions.short_description = '' 
    OR product_descriptions.short_description IS NULL, 
    product_descriptions.full_description, 
    ''
  ) AS full_description 
FROM 
  product_descriptions 
WHERE 
  product_descriptions.product_id IN (
    407680, 408185, 408191, 408208, 408237, 
    408948, 408963, 408964, 408989, 408995, 
    409500, 409511, 409513, 409518, 409547, 
    410269, 410280, 410282, 410818, 410821, 
    410826, 410830, 411580, 411590
  ) 
  AND product_descriptions.lang_code = 'en'

Query time 0.00128

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "20.05"
    },
    "table": {
      "table_name": "product_descriptions",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "product_id"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id",
        "lang_code"
      ],
      "key_length": "11",
      "rows_examined_per_scan": 24,
      "rows_produced_per_join": 24,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "17.65",
        "eval_cost": "2.40",
        "prefix_cost": "20.05",
        "data_read_per_join": "122K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`goimagine`.`product_descriptions`.`product_id` in (407680,408185,408191,408208,408237,408948,408963,408964,408989,408995,409500,409511,409513,409518,409547,410269,410280,410282,410818,410821,410826,410830,411580,411590)) and (`goimagine`.`product_descriptions`.`lang_code` = 'en'))"
    }
  }
}