Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29a32ae53dd786e38043a111ae2853520ec39c43cd0b376b64ace61c36d3a2c4' 
  AND token = 'Hp4D4traw+sl8ncg7KtzO/IPKXpcFaCeK07/gHmfr1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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