How to check access_token is expired?

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thanks for your response. which property need to consider as token expire value access_token.exp or expires_in ?

{
  "iss": "https://my-domain.auth0.com/",
  "sub": "auth0|123456",
  "aud": [
    "https://example.com/health-api",
    "https://my-domain.auth0.com/userinfo"
  ],
  "azp": "my_client_id",
  "exp": 1311281970,
  "iat": 1311280970,
  "scope": "openid profile read:patients read:admin"
}

{
    "access_token": "",
    "scope": "",
    "expires_in": 9600,
    "token_type": "Bearer"
}