Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ad30fa9fffff52b630734446c83aa8aed9112235486d4eac04cf27cd14af5d9' 
  AND token = 'IHLAZfc1pdDSVgBRro6SjzmdMaQbEYcxWKzYLsFUfGo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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