Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f29c3c9b4e677cafac8798be31fd6168ae7b1c8601486ac28a32a1e658a10dd4' 
  AND token = '9VUZsksiji/WO3HZg/Tg/xu323Iq9WuWYNByBdHNItM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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