SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3220d5c3c4319370f781ebec4bb4041f9d7fc8e19d95f195569216b1dd0fc643' 
  AND token = 'wJ9GBeuIvfZeHY3Vo4DLo28eqtBGThkH+5QGw6ojsi8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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