Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c1f76e3a60214991227a8544dcfcda6a8ba391cc0bfcff63a38f170398dd7c6' 
  AND token = 'egJZCE+qiJraqH3zf+D1cIAXrSnFX1TLbrxZF9GRaWc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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