SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98f4f6681b64a69b724ca1ac1deefc9bbf6bd8b373198aa6245ebfa60698320f' 
  AND token = '5xNPjUMdwGpGfZn3cuC/JDXI9xxI8n/YzXemVBVxVZY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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