Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd9e4222ba9ed55f1977117809dbbcecc3ab1e3b89db6803aa14dcf77e7cb6d3' 
  AND token = '9EPjIQxKfpkUF57UovzAcSEs+4Y4fJws/sMI8RASPpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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