Bricolage slow query

gistfile1.sql

SELECT s.id, s.uuid, s.priority, s.source__id, s.usr__id, s.element_type__id, s.first_publish_date, s.publish_date, s.expire_date, s.current_version, s.published_version, s.workflow__id, s.publish_status, s.primary_uri, s.active, s.desk__id, s.site__id, s.alias_id, i.id, i.name, i.description, i.story__id, i.version, i.usr__id, i.primary_oc__id, i.slug, i.cover_date, i.note, i.checked_out, group_concat( DISTINCT m.grp__id ), group_concat( DISTINCT c.asset_grp_id ), group_concat( DISTINCT w.asset_grp_id )
FROM   story_instance i, story_member sm, member m, story__category sc, category c, workflow w, story s 
WHERE  s.id = i.story__id AND sm.object_id = s.id AND m.id = sm.member__id AND m.active = '1' AND sc.story_instance__id = i.id AND c.id = sc.category__id AND s.workflow__id = w.id AND s.current_version = i.version AND s.active = $1 AND i.checked_out = $2 AND i.usr__id = $3
GROUP  BY s.id, s.uuid, s.priority, s.source__id, s.usr__id, s.element_type__id, s.first_publish_date, s.publish_date, s.expire_date, s.current_version, s.published_version, s.workflow__id, s.publish_status, s.primary_uri, s.active, s.desk__id, s.site__id, s.alias_id, i.id, i.name, i.description, i.story__id, i.version, i.usr__id, i.primary_oc__id, i.slug, i.cover_date, i.note, i.checked_out
ORDER BY i.cover_date, s.id

parameters: $1 = 't', $2 = 't', $3 = '2249'