slow query on widget event caledar

SELECT DISTINCT wp_posts.*, wp_postmeta.meta_value as EventStartDate, IF(tribe_event_duration.meta_value IS NULL, tribe_event_end_date.meta_value, DATE_ADD(CAST(wp_postmeta.meta_value AS DATETIME), INTERVAL tribe_event_duration.meta_value SECOND)) as EventEndDate, tribe_event_duration.meta_value as EventDuration FROM wp_posts INNER JOIN wp_postmeta ON (wp_posts.ID = wp_postmeta.post_id) LEFT JOIN wp_postmeta as tribe_event_end_date ON ( wp_posts.ID = tribe_event_end_date.post_id AND tribe_event_end_date.meta_key = '_EventEndDate' ) LEFT JOIN wp_postmeta as tribe_event_duration ON ( wp_posts.ID = tribe_event_duration.post_id AND tribe_event_duration.meta_key = '_EventDuration' ) WHERE 1=1 AND wp_posts.post_type = 'tribe_events' AND (wp_posts.post_status = 'publish') AND (wp_postmeta.meta_key = '_EventStartDate' ) AND ((wp_postmeta.meta_value >= '2013-11-24 00:00:00' AND wp_postmeta.meta_value <= '2013-11-24 23:59:59') OR (IF(tribe_event_duration.meta_value IS NULL, tribe_event_end_date.meta_value, DATE_ADD(CAST(wp_postmeta.meta_value AS DATETIME), INTERVAL tribe_event_duration.meta_value SECOND)) >= '2013-11-24 00:00:00' AND wp_postmeta.meta_value <= '2013-11-24 23:59:59' ) OR (wp_postmeta.meta_value < '2013-11-24 00:00:00' AND IF(tribe_event_duration.meta_value IS NULL, tribe_event_end_date.meta_value, DATE_ADD(CAST(wp_postmeta.meta_value AS DATETIME), INTERVAL tribe_event_duration.meta_value SECOND)) >= '2013-11-24 23:59:59' )) ORDER BY DATE(wp_postmeta.meta_value) ASC, TIME(wp_postmeta.meta_value) ASC LIMIT 0, 10    1