sqlserver 两个表查询，采用子查询，查询过期时间的信息，效率很慢

gs表， gs关联表
SELECT chiye_gs.id,company,gsid,sstime,setime
FROM chiye_gs INNER JOIN chiye_yw ON chiye_gs.id=chiye_yw.gsid
WHERE (sstime IS not NULL) AND setime< GETDATE() and (select COUNT(distinct gsid) from chiye_yw where chiye_gs.id=chiye_yw.gsid and setime >= GETDATE())=0
不加这句话，还可以，加上这个条件后，非常慢，该如何优化。数据表100万条数据 (select COUNT(distinct gsid) from chiye_yw where chiye_gs.id=chiye_yw.gsid and setime >= GETDATE())=0