SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cc146fd662608b52a37f1771ff4c525cccd48c78032d5e3ac30270164354fcc1' 
  AND token = 'zjFGRwSN3dwvv6mTKzYiJ0AvKiViJgh/YnrRUVfjTX8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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