Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '990f15e54bf0373cac51fefd0fcd1a61b5b97e944f1e49b16952797d47f1a8ad' 
  AND token = 'NWTn3z6PzTiLcbAhBx10C1WiCja92DlDPZBUdW8eHos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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