Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31a5617d1e5756d6a181a34b13c90aba59c2a34f521df0ab40e651f2b8241d66' 
  AND token = 'fBKm9DvkWW2BYy43OOelNBPvJFvtS4RKaesdR7CByZ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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