Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b352ee9f9d3717b875acfea9cc7ddb67b062010bd0e9d08943bf38a3762b162' 
  AND token = 'NwUjqfMYtzewtlmmRmOWNWrQXGq8Wji/G8DKDEjxA8Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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