SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd96c3338e61dcf9a3eda01f9e2dd040082223c061308819414b38e220bb8974b' 
  AND token = 'BtkMFAAM5o6i+AuP57bj7zWaCxuhIHnzqVKE7c9wMvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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