Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b85e7d65b67b4723b52b6ce8972ef1dda1589f1120ba61e833862e0bf3803bbc' 
  AND token = 'BZzw2uBIkBt+ThHR2PP1sJsY2JhCCQtRJRLEv68a3zM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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