Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8fb5db494754d878528ef54c211e8ecf869efa0f8712f11f3863337fc80eabca' 
  AND token = '5nBl5wQQMAC/nHJm4KdPPsSgt14nc/NSjZCyvPB9U2o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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