Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fec699e7df414a96d9cc072d7f7d6cf208c7545725050a58d4a9d76684fd8299' 
  AND token = '6JJSKVvEsIjn7SuUoK0J4tWP7h36yIIU6RJRfdlkItI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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