There are two artists currently using this name.

1) Keto is a lo-fi folk artist from Nottingham, UK whose style has been likened to Cat Power and Elliott Smith.

https://ketomusic.bandcamp.com/

2) Keto is Ukrainian post-hardcore band from Lutsk.
Now Keto is:
Stariy - guitar\vocals;
Anj - bass\vocals;
Lotr - keyboards;

www.ketoband.com