Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b31c6f3792d2600b79f94f83e547e5e5f2fce9109953943687c3d69febc5ae9a' 
  AND token = 'ts8yNC4zQg5mFhHkDaVM1c43iV7fgBvJ+DG0HVcsYTA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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