Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4c4b62ace8b73f1fa27a1beba6d4b84c9f016a69b778233b91291e511d1bd67' 
  AND token = 'oVfUbHEHwe80j6sqKs6vp5nuBD3iTX5DLgW+yWeeqsk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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