Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73a0dbee040642d2e49f8695667f313edaa2ca17e997570afaec86c7fc70c98d' 
  AND token = 'YUEbapv34y1FjJNOQ1hti6ZI5OrN7n5DolhtkuDvQqc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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