Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7141f8790e83152cf28aca939460908edba22e6d1b9e568f86737a25134be2fd' 
  AND token = '1fcnAMxHrRa2AEAvshklD2edyoybdfItmikZDqzUzUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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