Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'acf0ee5df1e15b498edea2c4b0007d1ef83172dce3fff7c955a430dc46418762' 
  AND token = 'OdFesKQvrGMHBz9BZB4wQcqICwDlxwXCn+9Aq2N2m70=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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