Explain hard query

set profiling=1;
SELECT sql_no_cache DISTINCT
                                BS.*,
                                B.LIST_PAGE_URL,
                                B.SECTION_PAGE_URL,
                                B.IBLOCK_TYPE_ID,
                                B.CODE as IBLOCK_CODE,
                                B.XML_ID as IBLOCK_EXTERNAL_ID,
                                BS.XML_ID as EXTERNAL_ID,
                                DATE_FORMAT(BS.TIMESTAMP_X, '%d.%m.%Y %H:%i:%s') as TIMESTAMP_X,
                                DATE_FORMAT(BS.DATE_CREATE, '%d.%m.%Y %H:%i:%s') as DATE_CREATE
                        ,COUNT(DISTINCT BE.ID) as ELEMENT_CNT
                                FROM b_iblock_section BS
                                        INNER JOIN b_iblock B ON BS.IBLOCK_ID = B.ID

                                        INNER JOIN b_iblock_section BSTEMP ON BSTEMP.IBLOCK_ID = BS.IBLOCK_ID
                                                LEFT JOIN b_iblock_section_element BSE ON BSE.IBLOCK_SECTION_ID=BSTEMP.ID
                                        LEFT JOIN b_iblock_element BE ON (BSE.IBLOCK_ELEMENT_ID=BE.ID
                                                AND ((BE.WF_STATUS_ID=1 AND BE.WF_PARENT_ELEMENT_ID IS NULL )
                                                AND BE.IBLOCK_ID = BS.IBLOCK_ID
                                )
                                )

                                WHERE 1=1
                                        AND BSTEMP.IBLOCK_ID = BS.IBLOCK_ID
                                                AND BSTEMP.LEFT_MARGIN >= BS.LEFT_MARGIN
                                                AND BSTEMP.RIGHT_MARGIN <= BS.RIGHT_MARGIN



                                AND  ((((
                                        (upper(BS.NAME) like upper('%hp%') and BS.NAME is not null)
                                         ))))
                                AND  ((((BS.IBLOCK_ID = '15'))))
                                AND  ((((BS.ACTIVE='Y'))))
                                AND  ((((B.ID = '15'))))
                                AND  ((((B.IBLOCK_TYPE_ID LIKE 'catalog'))))
                                AND  ((
                                B.ID IN (
                        SELECT IBLOCK_ID
                        FROM b_iblock_group IBG
                        WHERE IBG.GROUP_ID IN (2)
                        AND IBG.PERMISSION >= 'R'

                                AND (IBG.PERMISSION='X' OR B.ACTIVE='Y')
                        )
                                OR (B.RIGHTS_MODE = 'E' AND EXISTS (
                                SELECT SR.SECTION_ID
                                FROM b_iblock_section_right SR
                                INNER JOIN b_iblock_right IBR ON IBR.ID = SR.RIGHT_ID
                                INNER JOIN b_user_access UA ON UA.ACCESS_CODE = IBR.GROUP_CODE AND UA.USER_ID = 0
                                WHERE SR.SECTION_ID = BS.ID
                                AND IBR.OP_SREAD = 'Y'

                        ))
                        ))
                        GROUP BY BS.ID, B.ID
                                ORDER BY  BS.SORT desc;
show profile for query 1;