Refactored SQL query

Faster query

SELECT
  `relationships_relationship`.`id`,
  `relationships_relationship`.`source_id`,
  `relationships_relationship`.`target_user_id`,
  `relationships_relationship`.`target_project_id`,
  `relationships_relationship`.`created_on`,
  `relationships_relationship`.`deleted`
FROM
  `relationships_relationship`
INNER JOIN
  `users_userprofile` ON (`relationships_relationship`.`source_id` = `users_userprofile`.`id`)
INNER JOIN
  `projects_perusertaskcompletion` ON  (`relationships_relationship`.`source_id` = `projects_perusertaskcompletion`.`user_id`)
INNER JOIN
  `content_page` U1 ON (`projects_perusertaskcompletion`.`page_id` = U1.`id`)
WHERE
  `projects_perusertaskcompletion`.`unchecked_on` IS NULL
  AND U1.`project_id` = 355
  AND U1.`deleted` = False
  AND `users_userprofile`.`deleted` = False
  AND `relationships_relationship`.`target_project_id` = 355
GROUP BY
  `projects_perusertaskcompletion`.`user_id`, `projects_perusertaskcompletion`.`user_id`
HAVING
  COUNT(`projects_perusertaskcompletion`.`page_id`) = 4
LIMIT 56;

Original query: https://gist.github.com/4473163