Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '427949c8b8d26978d80eab4fde1ba33c7d86b6a388650afcf49d9936de852e4c' 
  AND token = 'JKMOJVdVAYnV3Y3eyJOjpuj1xsrcZJ39l1lSisUmS/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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