Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c88b08a37aad45870ebdf252eed62a0147f65d2bd399643157d6559f2e639696' 
  AND token = 'Ob0I/WQOq7dNjAjQpd4jbzT6aUXPJSkothWSezXqtvY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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