static boolean isExpired(Long expiresAtMs, long currentTimeInMs) {
    return expiresAtMs != Utils.Infinite_Time && currentTimeInMs > expiresAtMs;
  }
Returns if the blob has been expired or not, based on {@code expiresAtMs}.
@param expiresAtMs time in milliseconds referring to the time at which the blob expires.
@param currentTimeInMs current time in ms to determine expiration
@return {@code true} if blob has expired, {@code false} otherwise
ambry-tools/src/main/java/com/github/ambry/store/DumpDataHelper.java