SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'a586e3d2b9d2cc38612b16760f874ec03fce092c3912f897d1cb52cc4e2123d5' 
  AND token = 'FdG0IZvY22sAomJQMsavKN9HZWGVhh5D9+IPVRMXRpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}