Perform the following in the AWS Management Console:
1. Navigate to Route 53 dashboard at https://console.aws.amazon.com/route53/.

2. In the left navigation panel, under Domains, click Registered Domains.

3. Select the relevant domain..

4. On Your Domains ‘domain name’ page, in domain name configuration section, check the domain expiration date.

5. AWS Reference: https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/domain-extend.html