Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aea760d57fba72d0331c7f8df5e38970780833eb58bd17afa6d3b7dda0382eec' 
  AND token = 'xt4mylfU5ktRxO72xjYRO91sY9+leJk486u6t/zF1xw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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