Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c170c7a52b4932871ac9d700c5933c76e074d432dea4a008cd66acd12adc9b5d' 
  AND token = '/KQW/9fok8oyQpTUseQkzL/Iy83b8sDeT+ibXEHjwl0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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