Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71326790daf0fb87e6e68109c2465ccc6b9d77ade4830a82df461d644054e0a5' 
  AND token = 'YGGrvqZaL4nLyJS+N5WtibvLzVHvmu1KeAzcdapW6LA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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