Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5274f411e61dd05ceaa37abb1262b46f8b92eebc3ec1f5017a665352bef022fc' 
  AND token = 'Qn2nWWUz/kIA9nj2h+YhzLejMPLdBslXEMkB7OlD2/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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