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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae7afdad1e3ec7c5af743c395ac004c073f4601cd6c20713d43a42b7e6372764' 
  AND token = 'lCUc7YUXLUwVsj0ChOKzfegCnS/m7lxQI9+uI9+j01I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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