Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad3c4ce4a95db249209a58157535c8f1e66b99b74ffccfef556e7671ce332136' 
  AND token = 'aEY2jKY3ZtLErqXOUByszsQ8BXOGMc927zF/zBeLrIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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