The vault_payment_token database table stores the relationship between the payment tokens and the payment modules in the payment_method_code column, e.g.:
| entity_id | 1 |
| customer_id | 1 |
| public_hash | beb166f1a00a8cf7c3088fccba1e5fc857acb6b842a582e3b94a0f70f5f5b354 |
| payment_method_code | braintree |
| type | card |
| created_at | 2017-06-06 01:35:35 |
| expires_at | 2017-08-01 03:00:00 |
| gateway_token | kpvhv8 |
| details | {"type":"MC","maskedCC":"4444","expirationDate":"07\/2017"} |
| is_active | 1 |
| is_visible | 1 |