我怎样才能优化下面的mysql查询（我是优化的新手）

Question

如何优化此MySQL查询？

下面还提到了执行计划。

Select 
    tlk.id, um.store_users_id 
from 
    user_modules um 
inner join 
    module_chapters mc on um.modules_id =  mc.modules_id 
                       and mc.comment_status = 1 
                       and um.modules_id = 3697 
                       and mc.chapters_id = 4083 
inner join 
    context con on con.module_id = mc.modules_id 
                and con.chapter_id = mc.chapters_id 
inner join  
    user_talks tlk on tlk.contextId = con.id 
                   and tlk.context_scope = 1 
left join 
    talk_associated_users tau on tau.talk_id = tlk.id 
                              and tau.target_store_user_id = um.store_users_id 
where 
    tau.target_store_user_id is null

[！[以上查询的计划] [1]] [1]