Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9291c3f92c434c4ae9cb61824289f5f99aca5e021ba0a37557e6a92c82ce9226' 
  AND token = 'nGWSrYoLnsxXkVXbR9Yao9x3DcHH/+487ZXj++O+E8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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