Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0492f84fe0ad4aa58a104a0dbbab9a312549f0771a37a49316630688cd5a50ed' 
  AND token = 'V93KZZwf4xvm+HYXRLC8p8YXlv8TFRhY6kU9W4IY2l0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00095

JSON explain

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