Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91440842070c4d1a5a73328793b9dd6259c0d9438548b6631b19e9725416dc76' 
  AND token = 'vJmuVOuClAfnTjizzQtMz++N2oKU117O2pK1CuYMNyk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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