Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fe983eb7eb1fc2bdb8bd1fc5437b3c218dcb452a4f1d4539b4cb7bb49818279' 
  AND token = 'm8Y85Nap2J3ELNU1H7xWEFm00bA6ItfOG3HuMoOihMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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