Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47c33c1a0d9e4b90b2c5a1d4f2866177a7379ec22ee00b3b388a0e42d4b58ca1' 
  AND token = 'm44QAc6uJtJWtz906ITTCuDIJpBVJSTIBPMPRafyOLM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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