Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec545d05dc45b826b84d7c29a2654df8204828aca7d98c0ac48a847fa57372c5' 
  AND token = '0FI2LqdpGeF+tDwemUobMp7gBWkZDT9e2mtF0tVzHMc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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