SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46580acf9b1fa087d1b13a1db7b91bd71e3463a6c851f408f66355136e2f3c95' 
  AND token = 'hqnBU/Bs6mXqNZek4ZGEpzjdxHJY3DC1bZ2rIS7iREY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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