Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '7c6f3de26dec407c010bc1e10c827c72f8fc7b7d9d6f80a4e37b2b5807c601c9' 
  AND token = '2DhG8gdAEVnAdjvGXRHVtKK5GoagOYdTXeweZno47ZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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