Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85a4a05505e927cb27020aa332f500e7b007dacd907862b3577e0b0bcd029751' 
  AND token = '4tYfFAedjM9wdmQo7XXTDJOUd/ELGXuDOEpa6Rxj69I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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