Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ae0fb5bc62ad8aa06ac950fa6608a8710ab49ff83b04a24a342445def00a1d5' 
  AND token = 'vDm3N9XbdEaP0fYC7EXvuLFGeIq2gTtrq8BGVYbX9KU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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