SELECT 
  cscart_ult_product_descriptions.product_id, 
  cscart_ult_product_descriptions.short_description, 
  IF(
    cscart_ult_product_descriptions.short_description = "", 
    cscart_ult_product_descriptions.full_description, 
    ""
  ) AS full_description, 
  cscart_ult_product_descriptions.meta_keywords, 
  cscart_ult_product_descriptions.meta_description, 
  cscart_ult_product_descriptions.search_words, 
  cscart_ult_product_descriptions.promo_text 
FROM 
  cscart_ult_product_descriptions 
WHERE 
  cscart_ult_product_descriptions.product_id IN (349, 618) 
  AND cscart_ult_product_descriptions.company_id = 1 
  AND cscart_ult_product_descriptions.lang_code = 'en'

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_ult_product_descriptions",
      "access_type": "range",
      "possible_keys": ["PRIMARY", "product_id", "company_id"],
      "key": "product_id",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 2,
      "filtered": 100,
      "index_condition": "cscart_ult_product_descriptions.product_id in (349,618)",
      "attached_condition": "cscart_ult_product_descriptions.company_id = 1 and cscart_ult_product_descriptions.lang_code = 'en'"
    }
  }
}

Result

product_id short_description full_description meta_keywords meta_description search_words promo_text
349 <div align="center"><img src="./html/images/eight_ex4_size_en.jpg"></div> <div style="font-size:16px; border-bottom:dotted 1px #666666;margin:60px 0 20px 0;padding-bottom:8px;">Specification</div> <table align="center" width="100%" cellpadding="5" cellspacing="1" bgcolor="#424242" style="font-size: 10pt; color:#424242;"> <tr> <td align="middle" bgcolor="#ffffff"><div align="center"><strong>Code</strong></div></td> <td bgcolor="#ffffff"><div align="left"><strong>TLEEX4</strong></div></td> </tr> <tr> <td align="middle" bgcolor="#ffffff"><div align="center"><strong>Maker</strong></div></td> <td align="middle" nowrap="nowrap" bgcolor="#ffffff"><div align="left">EIGHT</div></td> </tr> <tr> <td align="middle" bgcolor="#ffffff"><div align="center"><strong>Maker Code </strong></div></td> <td align="middle" nowrap="nowrap" bgcolor="#ffffff"><div align="left">EXH-4</div></td> </tr> <tr> <td align="middle" nowrap="nowrap" bgcolor="#ffffff"><div align="center"><strong>Size</strong></div></td> <td align="middle" nowrap="nowrap" bgcolor="#ffffff"><div align="left">H=4 / L1=100 / L2=77 / Length=127 mm </div></td> </tr> <tr> <td align="middle" bgcolor="#ffffff"><div align="center"><strong>Fit Bolt </strong></div></td> <td align="middle" nowrap="nowrap" bgcolor="#ffffff"><div align="left">4mm hex head screw</div></td> </tr> </table> <p> <br> </p>