SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70931e6a8d6668cc04c973ec99fa59f9a19300df4b20ff684ddf388b80593877' 
  AND token = 'hVOzshiXeURTRQWUGrk/O9VQV6OgbdHnFKYjWfJ5+oE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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