Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10ba08ee5fa9e7e42dfd8f5fe5843fc193e413939035ef0af024f4926c8dea7b' 
  AND token = 'wDLUW/9nshZifd+nziQByrrsPpg7rmgIdKkLK4oWAkg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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