Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69df91ca0ba6976c6889e114598aaf16aa92ff6056eb860e224b146559f04b05' 
  AND token = 'LREFBFEPqoNlItV8Hc2eaJ5rL2KnvdU9ZW9xW0MhMbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}