Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40e2fd7063eb44b2b688a65e4e0e46276a72e3a40134a2474f088b59f11a4b84' 
  AND token = 'JCO2Vknr99OYmGBSwmbl29JuRxciNwfHw/9NJm9CJ5A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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