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 (
    3799, 3800, 3801, 3802, 3803, 3805, 3806, 
    3566, 3567, 3568, 3569, 3747, 3748, 
    3749, 3750, 3751
  ) 
  AND q_product_descriptions.lang_code = 'en'

Query time 0.00058

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "38.41"
    },
    "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": 16,
      "rows_produced_per_join": 16,
      "filtered": "100.00",
      "index_condition": "((`portal`.`q_product_descriptions`.`product_id` in (3799,3800,3801,3802,3803,3805,3806,3566,3567,3568,3569,3747,3748,3749,3750,3751)) and (`portal`.`q_product_descriptions`.`lang_code` = 'en'))",
      "cost_info": {
        "read_cost": "35.21",
        "eval_cost": "3.20",
        "prefix_cost": "38.41",
        "data_read_per_join": "61K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ]
    }
  }
}

Result

product_id short_description full_description
3566 <ul><li>Ideal for cleaning cars and motorcycles / Rounded corners with satin edging do not make a scratch / Soft and fuzzy microfiber cloth is highly absorbent and safe for surfaces</li></ul>
3567 <ul><li>It removes oils, fingerprints and smudges without scratch / It safe for car glass / It can clean the car without any sprays or polishes</li></ul>
3568 <ul><li>Waffle-weave material is suitable for fast cleaning without stains / It is super-absorbent / It dries, rinses and wrings easily</li></ul>
3569 <ul><li>It removes fingerprints, dust and grime on windows, furniture and electric appliances effectively / It can be used whether it is dry or wet / It can be used for cleaning and finishing surfaces / It dries, rinses and wrings easily</li></ul>
3747 <ul><li>Soft and good absorption</li><li>No residues left over</li><li>No damage on surface</li><li>Economical, save detergent</li></ul>
3748 <ul><li>Soft and good absorption</li><li>No residues left over</li><li>No damage on surface</li><li>Economical, save detergent</li><li>Easy remove dirt and dust</li></ul>
3749 <ul><li>Soft and good absorption</li><li>No residues left over</li><li>No damage on surface</li><li>Economical, save detergent</li><li>Easy remove dirt and dust</li></ul>
3750 <ul><li>Soft and good absorption</li><li>No residues left over</li><li>No damage on surface</li><li>Economical, save detergent</li><li>Easy remove dirt and dust</li></ul>
3751 <ul><li>Soft and good absorption</li><li>No residues left over</li><li>No damage on surface</li><li>Economical, save detergent</li><li>Easy remove dirt and dust</li></ul>
3799 <ul class="a-unordered-list a-vertical a-spacing-none"><li><span class="a-list-item">Utilized with non-slip textured surface provides safe and comfortable grip, these special features are perfect for handling dishes</span></li><li><span class="a-list-item">100% natural high-quality rubber</span></li><li><span class="a-list-item">Flexible, embossed nonslip grip</span></li><li><span class="a-list-item">Antimicrobial</span></li><li><span class="a-list-item">Length -39 CM Size: Large</span></li></ul>
3800 <ul><li>Soft & natural</li><li>Great for dish washing, car washing, sink cleaning and other chores</li><li>Antimicrobial</li><li>Flexible</li><li>Embossed nonslip grip</li></ul>
3801 <ul><li>soft & natural </li><li>great for dish washing, car washing, sink cleaning and other chores </li><li> antimicrobial flexible </li><li> embossed nonslip grip</li></ul>
3802 <ul><li>soft & natural </li><li> great for dish washing, car washing, sink cleaning and other chores </li><li> antimicrobial / flexible </li><li>embossed nonslip grip</li></ul>
3803 <ul><li>soft & natural / great for dish washing</li><li>car washing, sink cleaning and other chores </li><li>antimicrobial / flexible </li><li>embossed nonslip grip</li></ul>
3805 <p>Each side of it is composed of different materials so it can be used for various purposes in the kitchen / It is perfect for stainless steel appliances at home / It cleans in and around the sink effectively / It is highly absorbent and non-scratch / It dries, rinses and wrings easily</p>
3806 <ul><li>It cleans without any scratch </li><li> It cleans in and around the sink effectively </li><li> It is highly absorbent </li><li> It can be used without detergent </li><li> It dries, rinses and wrings easily</li></ul>