Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdccd46dd5f9264b5a1aea2f3fe87f4d442c60e3aaa3229e17d1536cc7295de6' 
  AND token = 'uNoOwOYmUWe2uVkkE4E/Vj0skZSlZvaalLtZbMzBFrA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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