Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2714691879299301585134e98678c682a95a0f73f2e1d99f1162bf6d4cb54db3' 
  AND token = '2ToTf19HkrQxZWaX5D7XOJem3IfJQi0bHkaHGckmjGA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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