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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, 
  cscart_product_descriptions.unit_name 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    189, 192, 168, 188, 203, 196, 3, 165, 167, 
    221, 166, 184, 193, 224, 160, 820, 169, 
    200
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.03208934,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_product_descriptions",
          "access_type": "range",
          "possible_keys": ["PRIMARY", "product_id"],
          "key": "PRIMARY",
          "key_length": "9",
          "used_key_parts": ["product_id", "lang_code"],
          "loops": 1,
          "rows": 18,
          "cost": 0.03208934,
          "filtered": 100,
          "attached_condition": "cscart_product_descriptions.product_id in (189,192,168,188,203,196,3,165,167,221,166,184,193,224,160,820,169,200) and cscart_product_descriptions.lang_code = 'en'"
        }
      }
    ]
  }
}

Result

product_id	short_description	full_description
3		<p>76g of Felicios Plantain Chips: are thinly sliced plantains that are deep-fried or baked until crispy and golden. They are a popular snack across Africa, the Caribbean, and Latin America, loved for their crunchy texture and rich, naturally sweet or savory flavor (depending on the ripeness of the plantain).</p> <p>They can be made from <strong>ripe plantains</strong> for a sweet taste or <strong>unripe plantains</strong> for a savory, slightly salty crunch. Often lightly seasoned with salt, spices, or chili, plantain chips are enjoyed on their own or served as a side snack with drinks and meals.</p> <p>Plantain chips are known for being <strong>satisfying, crunchy, and flavorful</strong>, making them a convenient on-the-go snack and a healthier alternative to some highly processed chips when prepared with minimal oil.</p>
160		<p>Puff-Puff;</p>
165		<p>Fried rice is a flavorful dish made by stir-frying cooked rice with vegetables, protein (such as eggs, chicken, shrimp, or beef), and seasonings.</p>
166
167
168
169
184		<p>Meat Pie;</p>
188	<p>TTEST GSDSDBJSJK</p>
189		<p><strong>Asoró (Yam Porridge)</strong> is a popular Nigerian dish made from yam cooked until soft and slightly mashed in a rich, peppery sauce with palm oil.</p>
192		<p>Cow leg is rich, gelatinous meat commonly used in Nigerian dishes like pepper soup, nkwobi, and assorted meat stews.</p>
193		<p>Ogbono Soup</p>
196		<p>A thick Nigerian soup made from melon seeds, vegetables, and protein.</p>
200
203		<p>Chicken cooked in a flavorful curry-spiced sauce.</p>
221
224
820