Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a3a030763933f6c90cce29662628f7237db29baa5b9624581084629a37e0d99' 
  AND token = 'vwbsxbS8iL0NB8NBvEHSIbSR3UWndajQv2jh1zwUDa0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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