SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '28797c2e1ea94bfcaf6d8f330bf68436508e09c43f2054a7bd840bc7827a94df' 
  AND token = 'n4nT2FoWd5Hh6k6qSsmQXUh6V+8D8ogxE1psLn6uFBw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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