Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf308fbf96a3a9d45c8902c39b25b6582c716bc0f13b94a4b0e36bd1ab40dcc6' 
  AND token = 'B6/4t+IvSnmgTXpjXLMwSMfmiQWC7aRtTMR9zXMXPQo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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