With your query try:
select filename,component,filearea from `mdl_files` where (`component` like "backup" and `filearea` like "automated")
The filename I think is actually determined by settings for the automated backups ... what to include in the filename ... shortname and/or course ID. Might also be good to use an alternative location for the autobackups ... ie, not in moodledata/filedir (a sea of files by contenthash names) to a designated directory outside of moodledata/filedir/ Setting it that way allows you to see the humanly recognizable name.
It's best not to mess with the code that does all that nor manipulate the database directly ... unless one really knows what they are doing.
'spirit of sharing', Ken