javascript getHours & getMinutes - myHours & myMinutes

have this:

let minute = timeSplit[0];
let today = new Date();
if (Math.abs(today.getMinutes() - Number(minute)) <= 5) {
  client.messages.create(
    {
      to: userPhoneNumber,
      from: "12055578708",
      body:
        "hello " +
        userNameString +
        ", \nYour training session just finished with " +
        trainerNameString
    },
    function (err, data) {
      if (err) {
        console.log("err: " + err);
      }
      console.log(data);
    }
  );
} else {
  console.log("not working");
}

what it does is get the current minute (ex. 45th minute of the hour), and subtracts it from the minute that is in my database. If my db minute is within 5 minutes of the current minute, then do the next part.

However, in my db I have both minute and hour stored. i need to check if the time in my db is within 5 minutes of the current time, including the hour. minute and hour are both just string values in my db. How can i do this?