Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4105df30dae62161acace41455de2cd71977ef17040d7d6f7f9e77967c8f8211' 
  AND token = 'xS0KVhlUdb1IryVzXK+93bvhhF8VL7jw0iXQkVKTTlM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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