Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f282ff0060a26f7db42fe06dd72ee3d25a2e215e122ff35cc77f47a4c7ddf857' 
  AND token = 'ltsTwNs2QzD1SjoqplGVyTVh4VXCiIIen8v6WzSxrPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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