Locker handle/lock

[BusyBuilder]

One of my external lockers has a stuck lock . The handle works and locker is open but can't turn with the key. Can I get another lock barrel ? Will it be a different key ?
Tia.

 

[Jez1966]

Tried PTFE/Graphite spray?
Spray, incert/remove key several time, repeat, then carefully turn, repeat as necessary.
Should clean/lubricate all locks a couple of time a year.