Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '285b6b606ab4a68741f236100d09b50cc4c9294aa408750f1685a25aac1e4300' 
  AND token = 'YPckPYulH1l8xN4oVZAN++b4JBnvkh9tb5h0pTS2L58=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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