Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e091d67dc1ac4750b3d3861caff22c2f500b8353a8d5e399a3d8f7f76f89370' 
  AND token = 'KkSXOnMK379bS/YkVQmerGpEJpK3NAfWtlrLQXjkwNM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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