SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c9579f05cda156db29879b02ab158b88c21d6ce8e978535c93d64c4446c44c41' 
  AND token = 'B+VEpb1gRfKPrYDKMNx5IHGkohhH5oM/0B00+Ig8ANU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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