Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5940c12604a234ffd28fb0fe37ae39e6be1074a76e9a1cb49eea6adbb8c32be3' 
  AND token = 'Zf7ScSY9f0D1PBWmdON4nufGuwQHkmRw/+vabaQrD9s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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