//código 1
SELECT gps_id, lat, lon
               FROM profile_30.gps
 WHERE
(datetime BETWEEN '2018-03-13 17:55:16' AND '2018-03-13 19:27:52')
AND
  utag_id = 209
               ORDER BY speed DESC LIMIT 1
//código 2
SELECT gps_id, lat, lon
               FROM profile_30.gps
 WHERE
(datetime BETWEEN '2018-03-13 17:55:16' AND '2018-03-13 19:27:52')
AND
  utag_id = 209
               ORDER BY speed and gps_id DESC LIMIT 1