SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '1b72a9808268f10d10fd83dc13c67cb1163e93514fc75917c73c91f1488e0fc9' 
  AND token = 'MRl9OX4N656nQKRJR9uFZH2gKoARMEvI/zDmk+YdPWs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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