slow query

# Time: 150701  9:10:17
# User@Host: ....[....] @ localhost []
# Thread_id: 66165  Schema: database_name  QC_hit: No
# Query_time: 26.932625  Lock_time: 0.000145  Rows_sent: 20  Rows_examined: 13899
use database_name;
SET timestamp=1435734617;
SELECT SQL_CALC_FOUND_ROWS  wp_posts.*, wp_eo_events.event_id, wp_eo_events.event_id AS occurrence_id, wp_eo_events.StartDate, wp_eo_events.StartTime, wp_eo_events.EndDate, wp_eo_events.FinishTime, wp_eo_events.event_occurrence  FROM wp_posts  LEFT JOIN
						( SELECT * FROM wp_eo_events ORDER BY wp_eo_events.StartDate ASC, wp_eo_events.StartTime ASC )
						AS wp_eo_events ON wp_posts.id = wp_eo_events.post_id  WHERE 1=1  AND wp_posts.post_type = 'event' AND (wp_posts.post_status = 'publish' OR wp_posts.post_status = 'confirmed' OR wp_posts.post_status = 'future' OR wp_posts.post_status = 'draft' OR wp_posts.post_status = 'pending' OR wp_posts.post_status = 'private') GROUP BY wp_posts.ID ORDER BY  wp_eo_events.StartDate DESC, wp_eo_events.StartTime DESC LIMIT 0, 20;
# Time: 150701 11:31:18
# User@Host: ...[...] @ localhost []
# Thread_id: 78860  Schema: database_name  QC_hit: No
# Query_time: 30.562176  Lock_time: 0.000092  Rows_sent: 20  Rows_examined: 13932
SET timestamp=1435743078;
SELECT SQL_CALC_FOUND_ROWS  wp_posts.*, wp_eo_events.event_id, wp_eo_events.event_id AS occurrence_id, wp_eo_events.StartDate, wp_eo_events.StartTime, wp_eo_events.EndDate, wp_eo_events.FinishTime, wp_eo_events.event_occurrence  FROM wp_posts  LEFT JOIN
						( SELECT * FROM wp_eo_events ORDER BY wp_eo_events.StartDate ASC, wp_eo_events.StartTime ASC )
						AS wp_eo_events ON wp_posts.id = wp_eo_events.post_id  WHERE 1=1  AND wp_posts.post_type = 'event' AND (wp_posts.post_status = 'publish' OR wp_posts.post_status = 'confirmed' OR wp_posts.post_status = 'future' OR wp_posts.post_status = 'draft' OR wp_posts.post_status = 'pending' OR wp_posts.post_status = 'private') GROUP BY wp_posts.ID ORDER BY  wp_eo_events.StartDate DESC, wp_eo_events.StartTime DESC LIMIT 0, 20;