Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94f9e4339594b600fdebf48e98d59854734b594379844df96fbc1af7816b33ad' 
  AND token = 'yZYFMZD3YYNfvZbZt/Xf0jXskcm/8MBe4Mlz/Zq9QTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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