The Windows 8 and Windows 10 Lockscreen times out after just 1 minute and the screens go black

You can add the dword registry value Attributes under

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\7516b95f-f776-4464-8c53-06167f40cc99\8EC4B3A5-6868-48c2-BE75-4F3044BE88A7]

and set it to 2 to add Console Lock Display Timeout to Advanced Power Options under display. Now all you have to do is go to Advanced Power Options and change the setting. I set mine to 0 so it never times out.

Source: This tutorial.