Add index for phpbb_topics.topic_type for ucp_front

SELECT t.* , tp.topic_posted, tt.mark_time, ft.mark_time AS forum_mark_time

FROM community_topics t  LEFT JOIN community_topics_posted tp ON (tp.topic_id = t.topic_id

AND tp.user_id = ***) LEFT JOIN community_topics_track tt ON (tt.topic_id = t.topic_id

AND tt.user_id = ***) LEFT JOIN community_forums_track ft ON (ft.forum_id = t.forum_id

AND ft.user_id = ***)

WHERE t.topic_type = 3

AND t.forum_id IN (***)

ORDER BY t.topic_last_post_time DESC, t.topic_last_post_id DESC