You can display the details of a configured key chain.
device# configure terminal
device(config)# show running-config keychain child
keychain child accept-tolerance 500 key 1 key-string $9$XutLBELmbQ765dsLycIP/A== encryption-level 4 accept-lifetime local true 11:49:11|11/09/2017 11:45:16|11/10/2017 key-algorithm HMAC-SHA-256 !