Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ebb107093e7c42dca3c7352ffe3c2267b484a83d6dc0f5074db7144c6058b94' 
  AND token = 'RhWC0cQrKRzBQzsEojw7qYNNdqsDiiHkrczY/10q3Y8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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