Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d3a3f26a151f2ef7d3a6ed07527208346486d9abdd6bc7fd7541e7880dcfddd' 
  AND token = 'ZoQwpxvctmYodK7aR912br5rD/OF2s5307pEn18Ur+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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