Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e28d634fd3dc205e4cc748a437f8144ac5c227a4aa8b1f31573b6d9461900634' 
  AND token = 'Q2i8iDMPTiZTVZnWsM0q8GdkXBQrwmn7Sw2gOiT054w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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