Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0bfc725015e522b933d3a553f410f1ca079e1b71fdf8105c5b28a23f63c0e28' 
  AND token = 'KGe+rwI3hFJzX0AkbPoPFiJw+1864maKfK/BEdlljmA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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