Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b97fc8365b027a1348a36089cde21ef00914979e3a96ed5afec3edb03664513' 
  AND token = 'NXCmTfzcn+gZK2CYLPBg9Ah2/2cJCr75uae7NcDx6BM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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