Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00ac525ffe87f57113c231b803e4050af05adb69a174d73f7d42f9ef57b09d43' 
  AND token = '5CZi65qHIRafgYM162+7eMa0CZqaYRaUM1dnKWNGocM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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