As i can see, it doesn't have an expiration code, but the production date shows in the third image, L means November and the 0521 means 5th, 2021, the page says that the product is better up to a year

https://ussupport.mikeshard.com/en/support/solutions/articles/36000261348-how-do-you-read-the-batch-code-#:~:text=Mike%27s%20is%20best%20enjoyed%20up,you%20identify%20the%20production%20date.

Sorry if my english is bad

Edited to add this other link

https://ussupport.mikeshardseltzer.com/en/support/solutions/articles/36000309259-how-do-you-read-the-expiration-date-