Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a005cdff8b63392a84468d0f00702fc869e020c8cbd37dcb2fd23820bdde0ee' 
  AND token = 'C1Pez5rqXJSlQxBlTTrWDmneVCgFkVgGkic1EKWm7x8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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