Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0664f9a4bf37ad0259b2a488cbda643dcc0e8eb83dabc2d8f0c482435a35a8b' 
  AND token = '2wZd6MrKOEj9LRZih70l+OZmha5NNKjquJA02YQ3EfM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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