Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4f317e1cee3527c6c52f4a116a2396dbe6701fdde95af1fbbd65cb42d975bec' 
  AND token = 'Utuk4gW4NzJttkQQpinJsIJJH3UavsNHtJdL0NAD6xw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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