Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '095f75f9ac3c1621587588a772dec33041bf896b0656a9eceee0464ccf43f789' 
  AND token = 'vnGYVkCnPh3FFd3zXsmqx86P2TblQy6+dFF1jVsdavk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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