Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f589b4ca5f4bea37a826af8dcda2d98bc0128102e0e12c22e9ade5d4a617f301' 
  AND token = 'nbMVGQPfjhMudhzhvp492YmO+MaHZhf3WHSc8/PWAds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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