Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '328ce4fd49d358a5938f282fee042d9b08ce9b8a772233ec849ff4426d7e3b93' 
  AND token = 'o/fXNiVWq5wc45rajn1tkNz/Qn1wj6pVC8G6LJdX//w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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