Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe54a43499acb045afd60dd4cdb038f1f802d8a4f6c7fc57bfe9a8446429218a' 
  AND token = 'vWj7xTQBp4XqHRrWuxc1M0dUh/ZKeb80hShI3kWdxrY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}