The key is a small pipe key and the lock has a single tumbler - no differs. You would call it a barrel-type bit key.
The locks were made in small sizes, often found on old caskets and moneyboxes. Try a handcuff key, you just might be lucky.
Your lock is presumably made in India, so I don’t know what size it is. Not a difficult key to make; once it goes into the lock and turns, it will almost certainly operate the lock.