Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66b7bfbf672a164b39b76339dec526a7d4887910410b771c2e26f85229f9c246' 
  AND token = 'DMf7PEzjMLRirDyG8MVrU6jQI8erhp4S4LqqCBWRoeI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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