Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03ccac77feac4bb64c9d65037a0cd5c992b5f258c54f1e6d511795af9fd76eb0' 
  AND token = '7tZPB8V/1Vx9rtcPlkmOy2VI4PxkDIvYkWl/hO/WlGc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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