SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef25f2d4cafcd36ad617e760d8f09ed4b97e80e4935a38f70ccc134137c5a599' 
  AND token = 'ggo3b/CwKzC4Z0zAw2xjcDM74QUXmkhylTvgoIXol+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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