SELECT 
  tmall_pages.*, 
  tmall_page_descriptions.* 
FROM 
  tmall_pages 
  INNER JOIN tmall_page_descriptions ON tmall_pages.page_id = tmall_page_descriptions.page_id 
WHERE 
  tmall_pages.page_id = 24 
  AND tmall_page_descriptions.lang_code = 'en' 
  AND (
    tmall_pages.usergroup_ids = '' 
    OR FIND_IN_SET(0, tmall_pages.usergroup_ids) 
    OR FIND_IN_SET(1, tmall_pages.usergroup_ids)
  ) 
  AND tmall_pages.page_type IN ('T', 'L')

Query time 0.00781

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "tmall_pages",
          "access_type": "const",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["page_id"],
          "ref": ["const"],
          "rows": 1,
          "filtered": 100
        }
      },
      {
        "table": {
          "table_name": "tmall_page_descriptions",
          "access_type": "const",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "9",
          "used_key_parts": ["page_id", "lang_code"],
          "ref": ["const", "const"],
          "rows": 1,
          "filtered": 100
        }
      }
    ]
  }
}

Result

page_id company_id parent_id id_path status page_type position timestamp usergroup_ids localization new_window use_avail_period avail_from_timestamp avail_till_timestamp abt__ut2_microdata_schema_type lang_code page description meta_keywords meta_description page_title link page_sitemap ab__emd_alternative_name
24 0 0 24 A T 0 1485118800 0 0 N 0 0 en Welcome to Multi-Vendor demo marketplace! <h3>What is Multi-Vendor?<br /></h3><h3 style="text-align:center;"></h3><p>Multi-Vendor is standalone software that allows you to create an online marketplace. </p><p>In Multi-Vendor, independent vendors can sell their products through a single storefront.<br /></p><hr /><p><strong></strong> </p><h2><img src="images/mve-how-to.png" alt="" /><br /></h2><p><br /></p><ul><li>As a store owner, you gather independent vendors in your marketplace.</li> <li>Customers buy products from different vendors and <strong>you get commissions from sales</strong>. </li> <li>Each vendor <strong>automatically</strong> gets his payment via PayPal.</li> </ul><hr /><p><br /></p><h3 style="text-align:center;">1,300 marketplaces are built with Multi-Vendor worldwide <br />making it the most popular solution for online malls.<br /></h3><p><img src="images/Map.png?1485172281098" alt="" /></p><p><br /></p><div class="ty-column1 ty-notice"> <p> Play around in our online demo. Place orders, add vendors, change settings to see how Multi-Vendor works.<br /></p> <p>If you have any questions, we will be glad to help you. Feel free to <a href="https://www.cs-cart.com/send-message.html">contact us!</a> </p> </div> Welcome to Multi-Vendor demo marketplace