Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c58bc5a32bf8d8a6535a1738cbc8dfe8e961f0fdfdecc76b67582988d4782648' 
  AND token = 'Pn+x5Y4C6sQJp8gWe50YLqRi1Mc5JiwETmNZGYw/0Q8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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