Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05a5d3d96887cbc46b996042ec44ed65ea8ecb78e7b6c0e6df052b7d613e4e1c' 
  AND token = 'BgV8fZkRF+eqj8u+UUoRCXBATqOGrL44o8VHd8ZI+1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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