The master lock key with the lion was made around the early 1920's.
A little history from the Etsy site "Supported by the financial investment of two friends, P.E. Yolles and Sam Stahl, Soref began his own company, Master Lock Company, in 1921. He patented the first laminated padlock in 1924. Master Lock marketed the padlock using a lion's head logo for name recognition"
( https://www.etsy.com/listing/77119664/masterlock-key-with-lion