Step function wait 10 seconds after current time

{
  "StartAt": "Wait",
  "States": {
    "Wait": {
      "Type": "Wait",
      "Seconds": {
        "Value": {
          "Fn::Sub": "${current_time} + 10"
        }
      },
      "Next": "NextState"
    },
    "NextState": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:us-east-1:123456789012:function:NextStateFunction"
    }
  }
}