SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '09b108d773336770b7eeb46ca5e6c0a49a3da68031acc9f76340e83a9a99d210' 
  AND token = '/EvBQTJZzQ6UyTvjqACNlLBbwsDhwBMqKJkbDGoYDAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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