Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90bcc617bae0e5db28a92d58ca48897f93481b5a9ecab6763aa9f7d09e998eda' 
  AND token = '41htdqAtx9tSIMqnFCEyuFCaFeSnYFAdvL4Xfz86grA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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