Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cb7ef751915e5787788757c4805d485d26ee257abace42cf02889f145dd25c3' 
  AND token = 'h9i/8w+is/fNtCruYlK5cPPoweb6x6PS+y1s8cr6N8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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