SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33d37da74198e16a4f5b8ea79cd64e7bb0f0c13f62437c3c66c3155c4c1d8821' 
  AND token = 'wwiugtd6hQwcvxX4yPuIpjme/GljoqpNNcxDJHz5k0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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