Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a768be0f1935c78128477e9149cd8710633676653a7887e8c649ad8656ae74e4' 
  AND token = 'qyfiW7Wgb0OvvvU5mWtXz7IIeiWvDW2Uog4SMrfIPuk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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