Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ffaa5c13dcf000917397d2556c0b8edfdf50c07f8ac3966e6e266fb1985f627' 
  AND token = 'O5WPYgznqfLncF6wwhV4a5eaW0dcP/HgrhgOjgkzcT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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