Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd302b6099cc1c3244ce7bd176dae59367d1d4a18d56d9e8c39de448f293397b4' 
  AND token = 'K+8avfvlNiL5L82uvz6j0oSHLDIq2uUpa8tjtDa0dVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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