Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ea4e9e617d6c86cd9118596191b8c72514c17468694b71fbdb0e2b1b948c3dd' 
  AND token = 'WEihbq1KJs1NqVKKJWaSINJEJSbvu8DNKJ99NDdh0a0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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