Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fb93790e1195f1050b0f013f79867fbef22df7de79adc1235473f2094bfcad45' 
  AND token = '6ES9LTOtkSHB0N+hTtI8CXBKEtfyCWmGNvMOVJ0KIHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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