EXPLAIN ANALYZE

SELECT ss.service_id
  FROM service.service AS ss
  JOIN account.account AS a ON (ss.account_id = a.parent_account_id)
 WHERE NOT EXISTS (SELECT subservice_id
                     FROM service.combination
                     JOIN service.service using (service_id)
                    WHERE account_id = a.account_id
                      AND subservice_id = ss.service_id)

   AND (account_id_exposed_to IS NULL OR account_id_exposed_to = a.account_id)
   AND a.account_id = 8219;