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SELECT 
  jmj_product_descriptions.product_id, 
  jmj_product_descriptions.short_description, 
  IF(
    jmj_product_descriptions.short_description = '' 
    OR jmj_product_descriptions.short_description IS NULL, 
    jmj_product_descriptions.full_description, 
    ''
  ) AS full_description 
FROM 
  jmj_product_descriptions 
WHERE 
  jmj_product_descriptions.product_id IN (
    1717, 1727, 1704, 1690, 1685, 1700, 1709, 
    1714, 1711, 1720, 1703, 1725
  ) 
  AND jmj_product_descriptions.lang_code = 'en'

Query time 0.01022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "28.81"
    },
    "table": {
      "table_name": "jmj_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": 12,
      "rows_produced_per_join": 12,
      "filtered": "100.00",
      "index_condition": "((`jmj_test`.`jmj_product_descriptions`.`product_id` in (1717,1727,1704,1690,1685,1700,1709,1714,1711,1720,1703,1725)) and (`jmj_test`.`jmj_product_descriptions`.`lang_code` = 'en'))",
      "cost_info": {
        "read_cost": "26.41",
        "eval_cost": "2.40",
        "prefix_cost": "28.81",
        "data_read_per_join": "45K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ]
    }
  }
}

Result

product_id	short_description	full_description
1685		<p><span style="font-size:40px;font-weight:700;">Queen Bedsheet Set -106x98 inches</span></p>
1690		<p>4 PC BEDDING SET</p>
1700		<p></p><h1>Green & Sea Green Reversible Mild Winter Single Bed Comforter</h1>
1703		<p></p><h1>2 Pieces Floral Pure Cotton Rectangle Pillow Covers</h1>
1704		<p></p><h1>Blue & White Printed Pure Cotton Single Bed Sheet & Pillow Covers</h1>
1709
1711		<p></p><h1> Rectangular Printed Floor Dhurrie</h1>
1714		<p></p><h1>Rubber Coir Printed Door Mat</h1>
1717		<p></p><h1>550 GSM Pure Cotton Soft Bath Towels</h1>
1720		<p></p><h1>Unisex Set Of 2 Red Solid 450 GSM Live Beautiful Hand Towels</h1>
1725		<p></p><h1>Purple 6 Pieces Pure Cotton 500 GSM Towel Set</h1>
1727		<p></p><h1>Grey 4 Pieces Textured Bath Accessories Set</h1>