We doesn't have the site to check your payout in v3, the SNOboard is still in the development.
However, you can use the Calculate the current earnings for v3 script to calculate your current earnings or past payouts.
You can also see your payouts on the blockchain: https://etherscan.io/ just switch to the Token view.
To view the status of the payout V2 please visit the Farmer V2 Payout Webapp tool.
You can also use the same link to look up your payout information for v2 nodes.