Sandbox

SELECT 
  vi_product_descriptions.product_id, 
  vi_product_descriptions.short_description, 
  IF(
    vi_product_descriptions.short_description = '' 
    OR vi_product_descriptions.short_description IS NULL, 
    vi_product_descriptions.full_description, 
    ''
  ) AS full_description, 
  vi_product_descriptions.meta_keywords, 
  vi_product_descriptions.meta_description, 
  vi_product_descriptions.search_words, 
  vi_product_descriptions.promo_text, 
  vi_product_descriptions.unit_name 
FROM 
  vi_product_descriptions 
WHERE 
  vi_product_descriptions.product_id IN (59, 58) 
  AND vi_product_descriptions.lang_code = 'en'

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "vi_product_descriptions",
          "access_type": "range",
          "possible_keys": ["PRIMARY", "product_id"],
          "key": "PRIMARY",
          "key_length": "9",
          "used_key_parts": ["product_id", "lang_code"],
          "rows": 2,
          "filtered": 100,
          "index_condition": "vi_product_descriptions.product_id in (59,58) and vi_product_descriptions.lang_code = 'en'"
        }
      }
    ]
  }
}

Result

product_id	short_description	full_description	meta_keywords	meta_description	search_words	promo_text	unit_name
58		<p>The AVH-P8400BH is Pioneer's top-of-the-line DVD multimedia receiver that features a beautiful 7" motorized touchscreen interface with our new Advanced Display Resolution technology, built-in Bluetooth® for hands-free calling and audio streaming, an HD Radio™ tuner, and Advanced App Mode for iPhone® 4/4S. The newly designed and innovative user interface makes direct operation of the unit stress-free by eliminating complicated layered selection displays, so access to desired functions is smoother and simpler than ever. A variety of multimedia options ensures that you will be properly entertained. Customizable audio and video functions make it easy to suit your mood.</p>				<p class="product-promo-text"><span class="product-promo-header">FREE US shipping over $100!</span><span class="product-promo-body">Orders within next 2 days will be shipped on Monday</span></p>
59		<p>The AVH-P4400BH DVD multimedia receiver features a 7" motorized touchscreen display, built-in Bluetooth® for hands-free calling and audio streaming, and an HD Radio™ tuner. The newly updated and innovative user interface makes direct operation of the unit stress-free by eliminating complicated layered selection displays, so access to desired functions is smoother and simpler than ever. A variety of multimedia options ensures that you will be properly entertained. Customizable audio and video functions make it easy to suit your mood.</p>				<p class="product-promo-text"><span class="product-promo-header">FREE US shipping over $100!</span><span class="product-promo-body">Orders within next 2 days will be shipped on Monday</span></p>