Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '651e59b3c5d930da2a4783e64da74524cbfca5873623b47d8861bafea4f918d0' 
  AND token = 'MgYFO7Y/rSOeQbLd2zRfrQlWeB/jqdZrMyoQy7UC0L4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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