Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f61df94b7a52f83ca8c48850c1dd75a619eae6633164aa0e183ddb4e52a7aac' 
  AND token = 'IYQKdGIMIym6vEGSg21w+JSdneF7ytP+aR87hXkFQxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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