Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e3f296b5fa9fb53c3ca7ad95e056eb68a12cf5ec6b14dade892396806809de3' 
  AND token = 'fI4Z8klNeQt/XTGiWDllsTacusqgbpE+3WKHDW6sBpo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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