SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1b7cc6afea5a39b111ed0882527f3659b85a37dc63df9bfcc30d30f140fb6448' 
  AND token = 'oyCV2zjFqZxhTeCmkAuTou3jxbq1ZPqz/G5ZEcolQl8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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