Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbb9bdf8b2e0d58aa5fc93b2b78e4066faf5d3e6cb85c66860338cb003148819' 
  AND token = 'oVJwliGeiryv5XRyWGPL1ANPmA2ai+GZnEY1FkVEk7E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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