Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63a12ae82b79700e72a4988109555fdd19461d16a96266f417fc457aee861928' 
  AND token = 'LpQMlKCKlZgeJ1NRmibsIob7MWdVTuBtXlx2XkfeNTo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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