Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b22c5659b935a8b7e9762efcd5f2fb8658f79ed7a815ed226f3d35bcbe58dcad' 
  AND token = 'YDwiUshDsR5cK2LrfIgJTHkjrYcbk18hj9fiyvCzmiU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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