You can run "recently written media" report for this job. In order to run, the report, go to reports tab, click on media classification and on the right hand side, you must have "recently written media" report. Click on run now to run the report. You can also schedule it, if you would like to receive this report periodically. This report will give you details of which media was last written at what time. But, through UI, there is no way you can sort the media based on last used time. Allocated time is what you would see as a column for media set. Although, if you look at the properties of each media, you would see modified time value there, to know when was this last written.
Please mark it a solution, if this is useful.
Thanks