SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '032000f505aeb92ee633780506d1e8967258cb74f44476d4d2f76c0625b0a71d' 
  AND token = 'r3zB+RGM38q8KemMgfZB734NzHpKDK665RvboHG/xRg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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