SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be822b55693783fa79f2e15d23853915bf6d27fef589b8c48062035215ae9632' 
  AND token = 'BikTz4T/GGIoYLZUQA1z78+JI1w5afQuKE0lfTOg8j0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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