Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29d4a01053777ff10fd59387cb20394a7d514a3d8a2c50b88efcd631845ff665' 
  AND token = 'Yn1We7ggkB8awPyk9iDVUxRL3xWhhZaa8DaZ77xyeuM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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