Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b5ae914dfdce8d4b149c75e574ade5e15f480d7094451a306e6a0bb489c61bc' 
  AND token = '3Y/buLqflPISd4Xs6i8uej0WBgAdxdP2GmkWWhnqLak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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