Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7efc7522571da7537e44ebd4da835f64c072e2dd3528ef4572fa1cc50414f12' 
  AND token = 'ty9DCbhqcJKAzPN3hoV6PST9y/dPf5ua2zfBdTfNnzI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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