Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dde51d294d04e7f96d7d58119c71d89af6fbdb781b92008258f6d81a433444b7' 
  AND token = 'QtslkJze36AsLueNrrltgx0GWuVh11aF9xwSu9e5yIM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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