Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'edf3708c9683ab78cd98b6a6b20c15774792c3c4fe2e0ba38ab40be3bb5aa357' 
  AND token = 'JfGGJlJhJNzUAmooWncDfEFF++o+8K2YdMss4StOHec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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