Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9af9d71f56de62e012fe63444ff9ad45dad971bea7ff918e3daef04168034087' 
  AND token = 'Bl5j+6P3HCSyrv2f8uafWmQtO6+RmANdWJqAMk4yXTk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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