Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30b5b1664f750e2b5eb2a9906d50dc6f1f7133ddf458483ec4ab9e17b9e856c0' 
  AND token = 'LcFxP1Bify/TBKj+JbTaFJnaXSnouQH4lxakzqnaKFw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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