Slow queries

[tscbh]

I had this type of query which show on my slow-queries log. It always cost my server about 5~6 seconds.

Could you please tell me if this is normal. How do I optimize it?

I do not have any other queries as slow as that.

# Time: 080507 18:05:58
# User@Host: forum @ [192.168.0.1]
# Query_time: 5 Lock_time: 0 Rows_sent: 30 Rows_examined: 328846
use forum;
SELECT user.*,usertextfield.*,userfield.*, user.userid, options,
IF(displaygroupid=0, user.usergroupid, displaygroupid) AS displaygroupid
,IF((NOT(options & 1024) AND (user.usergroupid IN (-1,6) OR FIND_IN_SET('6', membergroupids))), 0, reputation) AS reputationscore,level
,avatar.avatarpath,NOT ISNULL(customavatar.userid) AS hascustomavatar,customavatar.dateline AS avatardateline, customavatar.width AS avwidth, customavatar.height AS avheight

, IF((options & 512 AND user.userid <> 0), 1, lastactivity) AS lastvisittime

FROM user AS user
LEFT JOIN usertextfield AS usertextfield ON(usertextfield.userid=user.userid)
LEFT JOIN userfield AS userfield ON(userfield.userid=user.userid)
LEFT JOIN reputationlevel AS reputationlevel ON(user.reputationlevelid=reputationlevel.reputati onlevelid)
LEFT JOIN avatar AS avatar ON(avatar.avatarid = user.avatarid) LEFT JOIN customavatar AS customavatar ON(customavatar.userid = user.userid)

WHERE 1=1
AND user.usergroupid IN (-1,6,7,2,5)
ORDER BY reputationscore asc , user.username
LIMIT 61680, 30;