Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b403fc3077a1f4b961ea243d459b876357a9093192f0487a01a432f1a40042dc' 
  AND token = 'rBEFX74t8YoF2yb6Rlehi6dOL2nSXp4oCd57Ek9cye4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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