Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d381519e9a4349d1808c50f8e7944c82e5442af7a1e7af5a2a6cf8310ec1ec4' 
  AND token = 'kJT0OoBYGMeUnKXqDpx8A5/Dhh7BlqxW0qS6o1Zb20M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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