SELECT 
  COUNT(
    DISTINCT(cscart_pages.page_id)
  ) 
FROM 
  cscart_pages 
  LEFT JOIN cscart_page_descriptions ON cscart_pages.page_id = cscart_page_descriptions.page_id 
  AND cscart_page_descriptions.lang_code = 'en' 
  LEFT JOIN cscart_banners ON (
    cscart_banners.abt__yt_page_id = cscart_pages.page_id 
    AND cscart_banners.abt__yt_page_id > 0 
    AND cscart_banners.status = 'A' 
    AND cscart_banners.abt__yt_data_type = 'blog' 
    AND (
      cscart_banners.abt__yt_youtube_use = 'Y' 
      OR (
        cscart_banners.abt__yt_product_list_use = 'Y' 
        AND trim(
          cscart_banners.abt__yt_product_list
        ) != ''
      )
    ) 
    AND (
      cscart_banners.abt__yt_use_avail_period = 'N' 
      OR (
        cscart_banners.abt__yt_use_avail_period = 'Y' 
        AND cscart_banners.abt__yt_avail_from <= 1782629543 
        AND cscart_banners.abt__yt_avail_till >= 1782629543
      )
    )
  ) 
  LEFT JOIN cscart_banner_descriptions ON (
    cscart_banner_descriptions.banner_id = cscart_banners.banner_id 
    AND cscart_banner_descriptions.lang_code = 'en'
  ) 
  INNER JOIN cscart_ult_objects_sharing ON (
    cscart_ult_objects_sharing.share_object_id = cscart_pages.page_id 
    AND cscart_ult_objects_sharing.share_company_id = 1 
    AND cscart_ult_objects_sharing.share_object_type = 'pages'
  ) 
WHERE 
  1 
  AND cscart_pages.parent_id IN (8) 
  AND cscart_pages.status IN ('A') 
  AND cscart_pages.page_type IN ('B') 
  AND (
    cscart_pages.usergroup_ids = '' 
    OR FIND_IN_SET(0, cscart_pages.usergroup_ids) 
    OR FIND_IN_SET(1, cscart_pages.usergroup_ids)
  ) 
  AND (
    cscart_pages.use_avail_period = 'N' 
    OR (
      cscart_pages.use_avail_period = 'Y' 
      AND cscart_pages.avail_from_timestamp <= 1782629543 
      AND (
        cscart_pages.avail_till_timestamp >= 1782629543 
        OR cscart_pages.avail_till_timestamp = 0
      )
    )
  ) 
ORDER BY 
  cscart_pages.timestamp desc

Query time 0.00064

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_pages",
          "access_type": "ref",
          "possible_keys": ["PRIMARY", "parent_id"],
          "key": "parent_id",
          "key_length": "3",
          "used_key_parts": ["parent_id"],
          "ref": ["const"],
          "rows": 1,
          "filtered": 100,
          "attached_condition": "cscart_pages.`status` = 'A' and cscart_pages.page_type = 'B' and (cscart_pages.usergroup_ids = '' or find_in_set(0,cscart_pages.usergroup_ids) or find_in_set(1,cscart_pages.usergroup_ids)) and (cscart_pages.use_avail_period = 'N' or cscart_pages.use_avail_period = 'Y' and cscart_pages.avail_from_timestamp <= 1782629543 and (cscart_pages.avail_till_timestamp >= 1782629543 or cscart_pages.avail_till_timestamp = 0))"
        }
      },
      {
        "table": {
          "table_name": "cscart_ult_objects_sharing",
          "access_type": "eq_ref",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "159",
          "used_key_parts": [
            "share_object_id",
            "share_company_id",
            "share_object_type"
          ],
          "ref": ["n764025_kutubminar123.cscart_pages.page_id", "const", "const"],
          "rows": 1,
          "filtered": 100,
          "attached_condition": "cscart_ult_objects_sharing.share_object_id = cscart_pages.page_id and cscart_ult_objects_sharing.share_object_type = 'pages'",
          "using_index": true
        }
      },
      {
        "block-nl-join": {
          "table": {
            "table_name": "cscart_banners",
            "access_type": "ALL",
            "possible_keys": ["status"],
            "rows": 24,
            "filtered": 100,
            "attached_condition": "cscart_banners.abt__yt_page_id > 0 and cscart_banners.`status` = 'A' and cscart_banners.abt__yt_data_type = 'blog' and (cscart_banners.abt__yt_youtube_use = 'Y' or cscart_banners.abt__yt_product_list_use = 'Y' and trim(cscart_banners.abt__yt_product_list) <> '') and (cscart_banners.abt__yt_use_avail_period = 'N' or cscart_banners.abt__yt_use_avail_period = 'Y' and cscart_banners.abt__yt_avail_from <= 1782629543 and cscart_banners.abt__yt_avail_till >= 1782629543)"
          },
          "buffer_type": "flat",
          "buffer_size": "10KiB",
          "join_type": "BNL",
          "attached_condition": "trigcond(cscart_banners.abt__yt_page_id = cscart_pages.page_id and cscart_banners.abt__yt_page_id > 0 and cscart_banners.`status` = 'A' and cscart_banners.abt__yt_data_type = 'blog' and (cscart_banners.abt__yt_youtube_use = 'Y' or cscart_banners.abt__yt_product_list_use = 'Y' and trim(cscart_banners.abt__yt_product_list) <> '') and (cscart_banners.abt__yt_use_avail_period = 'N' or cscart_banners.abt__yt_use_avail_period = 'Y' and cscart_banners.abt__yt_avail_from <= 1782629543 and cscart_banners.abt__yt_avail_till >= 1782629543))"
        }
      }
    ]
  }
}