Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd89988be9c50036512ab1a36eac3d53772141575ae58932b29f63e2bf00f2023' 
  AND token = 'NpB6qgZpbzFKpDpyaQMx+CmmxNtkvpTdzQ8wpy2kDlM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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