SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67a7edb22557888fe9dbceefac6d6635859c02bd450b6394344e580447bf088c' 
  AND token = '/tw3MvhG3SB1leRVmvgJynLCy7RcUeiZLOVXaR53YLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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