Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bbbd430b909cb6509a805e1a8c1699590bdaf4f025895b4630db83f8b0bef3f' 
  AND token = '7yQYm0wzqIx6McaOjhTyIwTQePg+gEdnKCOoV1AeZWs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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