Search results for '1%' AND SLEEP(5) AND '%'='))) AND 4610=('qkvxq'||(SELECT CASE 4610 WHEN 4610 THEN 1 ELSE 0 END FROM RDB$DATABASE)||'qpkqq') AND'

Your search returns no results.
Maximum words count is 10. In your search query was cut next part: ELSE 0 END FROM RDB$DATABASE)||'qpkqq').