Problem to create x-axis as realtime timestamp with periodic query

Hi all,

I want to create a monitoring dashboard for disbursement that got stuck in pending status for some banks every minute. I am running this query

and try to visualize it on bar chart with time on x-axis. but problem is, i could not find a way to run x-axis as the actual time with range 0-15 minute. instead, i could only put the created_at data as timestamp in x-axis