Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3e708764ed4b558f1c7ebf38c58182240a246ee5713af0e5f9b568cff6d3592' 
  AND token = '3Z9YUYORnamltcAfiP3upik6sqlybSbO+uwfFXlgreY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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