Once you're in MEW, scroll down and on the right hand side of your screen you should see this:
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Click on "Show All Tokens". It should show RLTY automatically now.
If you don't see your RLTY tokens there, you can click "Add Custom Token" using the following info:
Token Contract Address: 0xbe99B09709fc753b09BCf557A992F6605D5997B0
Token Symbol: RLTY
Decimals: 8