Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14fd714ce0f7abec7738fe040c67b5ddf43491c025448dec0c8b8b21849e307e' 
  AND token = 'muUcd0sBzKFyLfdoGCIAn6rJQefXpN2qWV/7XwCltac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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