Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab4e7f39ea2ec3733b080f1b32a93065d547b09be04f598c1038baf22db9b40d' 
  AND token = '3yC5PBxObfHqwKv01NjUe8I9U/fBzfCwthBfI8EZs/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}