Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '21fea25ec9823ddf38ba9a3bc1300f2b058161e56728f35cdbf0fc5fd93055dc' 
  AND token = 'VTh1S+mx9ORJ68N3rtKZJQo6Or8t6uKbr877O9G0paA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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