Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e76c8a3cab527ef8d4a52a5393bd1f26b9cd804723f3be020689c5dafbbefca' 
  AND token = 'MMkg+6uXPTiivVL/Tj2ox6hTHuzI2BRVPPz8x4E/6BA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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