SELECT 
  q_product_descriptions.product_id, 
  q_product_descriptions.short_description, 
  IF(
    q_product_descriptions.short_description = '', 
    q_product_descriptions.full_description, 
    ''
  ) AS full_description 
FROM 
  q_product_descriptions 
WHERE 
  q_product_descriptions.product_id IN (
    32554, 32555, 32556, 32557, 32558, 32559, 
    32560, 32562, 32563, 32564, 32565, 
    32566, 32567, 32568, 32569, 32570, 
    32571, 32573, 32574, 32575, 32576, 
    32577, 32579, 32580, 32581, 32582, 
    32583, 32584, 32585, 32586, 32588, 
    32589
  ) 
  AND q_product_descriptions.lang_code = 'en'

Query time 0.00083

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "76.81"
    },
    "table": {
      "table_name": "q_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": 32,
      "rows_produced_per_join": 32,
      "filtered": "100.00",
      "index_condition": "((`portal`.`q_product_descriptions`.`product_id` in (32554,32555,32556,32557,32558,32559,32560,32562,32563,32564,32565,32566,32567,32568,32569,32570,32571,32573,32574,32575,32576,32577,32579,32580,32581,32582,32583,32584,32585,32586,32588,32589)) and (`portal`.`q_product_descriptions`.`lang_code` = 'en'))",
      "cost_info": {
        "read_cost": "70.41",
        "eval_cost": "6.40",
        "prefix_cost": "76.81",
        "data_read_per_join": "122K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ]
    }
  }
}