Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '926ee467bcc3c2414b1ea2ac3f39c1c94d92d9b792dee8c5184b9217e5d31b5e' 
  AND token = 'E81kzB9T7IVAn0L97IWrU8MxWR8ggdSQcs3NjAvdWCc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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