Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5564a973cf1a3988eb3d6bf319f3f1972838d1307a809eaa7389c31d3d76205e' 
  AND token = 'Dxc0z1AAsc1Q5j0GKQvf5F/TfKzRaVYb/3MYPm9m6rs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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