SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a781cf520b8c9d694303863142aa8fa5cca71fd4122e75ae2798f134b36cd66' 
  AND token = '3UOyJKlnWfIP7RCOWM/wuVip5R0EUA/KYdzxJVuXcts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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