Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab41514c816f6dcd15240438d3c79675d757d421d36d6044fbd9d51119be5565' 
  AND token = 'Vix4EX9QKaDzqRfDJyZEP1X7hO9r7WLty+vDhYLKx4M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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