Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd03b5860f7d46c68e04910875d93f31a8202e5e71d4fc5a930914a0bce1b5f7a' 
  AND token = '3TGAZcXOClfH8ItwrV7k/uvN0bpnxo3z5D4aDkvCB5k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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