Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3e455bb682cde442cc09ac56b9159f0f383277083de40294908ef8840b951131' 
  AND token = 'dkxL/jnlj3pnR9A4iptliAyIHfWaE+ZksKMwOqmuLAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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