Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '944ae8f9167ea4850ec593a8b33befa6d2113a240793b6a5aae10ddac42f1388' 
  AND token = 'yquGdUHHl19EQ3GlWowPxIozRAUVZUoCRIyW5HA3Mbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}