Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '325ddbdae5228ef0e955542b3c67fc66ab029f7ca21f718893d7f904beb93860' 
  AND token = 'to3Ayps7NEWBdxT0pgIFQzDRV8PnhV4pTzCzg5IZp7A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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