Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e455e676691b59d8896251c2f6c79fa17d9d89734b7b67cf50613e859808d8c' 
  AND token = 'vYHni/lo6lkzL94ggytlWLSqC4mT10cnmM5jjte+gxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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