Mysql query optimization? Please help me

Here is part of the structure of my current database:
table permissions:
id
permission

table groups
id
name

table groups_permissions
id_group
id_permission

table groups_users
id_group
id_user

table entries:
id
name

table entries_groups
id_group
id_entry

One user can belong to many groups, one group can control many
entries. Given a list of entries and the user_id, I need to check if
that user can control those entries, and if possible return a list of
entries that the user can/can't not control.

Currently I'm using the query below, if the returned COUNT doesnt
match the number of entries given then the user doesnt have accesst to
all the give entry. Is there any better way to do this?
SELECT COUNT(*)AS COUNT FROM entries_usergroups, users_usergroups,
permissions_usergroups, permissions
WHERE entries_usergroups.entry_id IN ($entry_list)
AND users_usergroups.usergroup_id = entries_usergroups.usergroup_id
AND users_usergroups.user_id = $user_id
AND permissions_usergroups.usergroup_id =
entries_usergroups.usergroup_id
AND permissions.id = permissions_usergroups.permission_id
AND permissions.name = '$permission';


Thank you.