Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16294a600c87edd08ab7a5051ca29284aa9e6e1f36277d42479f3fbd4bd02841' 
  AND token = 'je0aaif0QyvOjwfSPi+Id6RgqKBDXAhlHyfqGNpWqUk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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