Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3009b28b4d72c924c6382b186abe982cba71198da5c3b57c0116703e8f068a4' 
  AND token = 'WraTZWXlLIQI5uBFOMd3wti73+WLfdc1jtTidEkHYqE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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