If you don't have access to the MC then you probably don't have access to the _internal index, which is where run times are reported.
This should get you started.
(index=_audit host=* action=search sourcetype=audittrail search_id!="rsa_*") | eval user = if(user="n/a", null(), user) | eval search_id=replace(search_id, "'(.*)'", "\1") | eval search=if(isnull(savedsearch_name) OR savedsearch_name=="", search, savedsearch_name) | stats min(_time) as _time, values(user) as user, max(total_run_time) as total_run_time, first(search) as search, first(apiStartTime) as apiStartTime, first(apiEndTime) as apiEndTime by search_id
The Monitoring Console has a dashboard for that. See Settings->Monitoring Console->Search->Search Usage Statistics: Instance then scroll down.