Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'feb0a48eb58a6d3f45cc6c3987ee2a24bc426fe82dd99d3116eb79059190c0cb' 
  AND token = '08BxGm+GggOXyxfwItgcFGcYIk9yS1SURFLKfNjbSgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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