Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72a20d042f1449d57359b41e5c971a78f4ece2982be68711eacbabebd1776b2d' 
  AND token = 'f9TW7c+DenpETk9aK4bJddrYOG6DedsoVpIB2ZAIL2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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