SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82980a25fd56616d915227d59855544830fda8c0d6318bba119cca84beb4fc29' 
  AND token = 'rZtQ2SQHT+jc3qIogUk6K+hIE/MfRCATTf/X6aFz974=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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