Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '377361ad9824e2897e9513849b9fea30d435c7bea0057e17178ed6ea49ef199a' 
  AND token = '5MIUAB52MNm1eTJ2OMPYF5NXxojUsKTRqKczdEa0cZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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