Search results for '1%' AND SLEEP(5) AND '%'='')) AND 5553=(SELECT COUNT(*) FROM sysusers AS sys1,sysusers AS sys2,sysusers AS sys3,sysusers AS sys4'

Your search returns no results.
Maximum words count is 10. In your search query was cut next part: sys2,sysusers sys3,sysusers sys4.