Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '478d7d303b3578e0a00f5615d6b6e6ab61ee741a9730e3850f5eb5a5383d8847' 
  AND token = '5Q8Xn6yccOzx/SEtWL/2lV1WXYVialH7LyZNewQcn4A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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