If you enabled File History (it's disabled by default), all you have to do is use it to recover the file. File History saves the state of the included folders at a specific time.

How to Recover a Microsoft Excel File That Is Not in a Recognizable Format. If Microsoft Excel fails to recognize a file in the XLSX or XLS format, the data contained in the file could be corrupted.

Lost files can usually be recovered—if you discover the loss soon enough. But every time you write to the hard drive, you lower the likelihood of a successful recovery.