There is two commands to kill query
Soft kill: pg_cancel_backend(pid)
Hard kill pg_terminate_backend(pid)
SELECT
pg_terminate_backend(pid)
FROM
pg_stat_activity
WHERE
pid <> pg_backend_pid()
AND query LIKE '%<CONDITION>%'
AND state = 'active'
and(now() - pg_stat_activity.query_start) > interval '5 minutes';