Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe55540b52ca0d914b635a3d74bc0d176bfd939f75f8f1e515532d2d9f45e053' 
  AND token = 'Gm6MR53/qNkdFvpZoAawEfTLpJpMZDXHAqJa5B6X6TA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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