Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4675fdf82802b60dd0bc2a9123ecefb0e8b336ae7808c65bef96e07aa052626' 
  AND token = 'NGvMQpsE9guL1MQTqNa4PUqbB2ctDmM7Ppn9Fa5CYm8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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