Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5320cff0b97fd0918e5b1567afa3019c9ce7ff045ddfb21540622acb9ba1dc5c' 
  AND token = 'ZqrTzT8jbn5ReVaff8Aexj/ho6yVlXBVMk42a501fcQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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