Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7da1da6e847ef7c270103c92c69ba157fad8e84e9f5a1fbca88feae59f856974' 
  AND token = 'ybyMR5kGRv7tAccu8YLhB8YvLkXhjgB11xgOMI6xiD0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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