Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49978793cc9da031991d4e7d8223cf1911c5e1f8e186ac901d541058e0ee5166' 
  AND token = 'YxUy8VULWoVSol7GXOs6VCu4Om1nRVIHtCPvQW+fqhs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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