If the key is short like "key", maybe. But without key, can’t solve easily.
Sometimes people shift fingers one key to the left/right on QWERTY. thmyl mlf hwyat synyt mn mydya fayr
Atbash of thmyl : t ↔ g h ↔ s m ↔ n y ↔ b l ↔ o → gsnbo (not English) — fails. If the key is short like "key", maybe
However, a : Some online cipher solvers identify thmyl mlf hwyat synyt mn mydya fayr as ROT-7 on first glance? Let me check: maybe. But without key
Check mn — common word in English could be in , on , my , me , no , so . If mn = in , then m→i (-4), n→n (+0) — not consistent shift.