Yes, Google Pay is available to all non-rooted Android phones (Lollipop 5.0 and above). All Xperia phones come with NFC technology, allowing you to make wireless payments.
You can download Google Pay here. However, depending on your country, banks or cards that support Google Pay might differ. Your phone might be able to run Google Pay, but your bank and card might not. You can check the countries or regions that support Google Pay here. Click on your country to find out which banks and cards are supported.