Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd83e531ef46aa6ed26f48db44b8b555d29c6c388ff2ad22c32f10d8c706c882a' 
  AND token = 'f2MRs5h7V9OdO35ewqt3x9WhI8p1fAYVg/7SqSZ7wcA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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