I had this exact same question sometime ago when working on identifying indexation issue of a site.

After doing some research online, apparently there are couple of ways.

Just use one of the links below by substituting the example.com with your own URL.

https://www.google.com/search?q=inurl:https://www.yourwebsite.com/&as_qdr=y15

https://www.google.com/search?tbs=cdr%3A1%2Ccd_min%3A1%2F1%2F2000&q=site%3Ahttp%3A%2F%2Fhttps://www.yourwebsite.com/&safe=active&gws_rd=ssl