Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5935fe9400b54493eba395ca3f3cf4b2c99633878f45aa7fd7c96e95f3c46920' 
  AND token = 'sYAWwYbMSlvAYMjqdhB7ATJUMtO5oFozDiVWhyDeLkc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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