Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c36f2acdfddc36870a368afe884a62759dcb58dc044ff94fa206baa79c0c7600' 
  AND token = 'waiEZ78VHsttusUn4HP1Wlf5G2lgnvuaDDlxK13/1XU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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