Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a10bdf8b0017327329068100e32ef43f0bac39d79f23264b4d0ad1eef1e2a9a6' 
  AND token = 'wV0hJ1rVcQhOqDABMUfQiDHA1hEqZz478KnZAL2KE50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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