Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e10d35340771fcbb34b95f7843d224f1ba6b8b161f5b8e112aa9d0966650cf8' 
  AND token = 'PwP8XTESjvDHaLeNajScoevLA2wSNanNtDR5OqvC8/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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