SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cce2b7010d36f7766c098bed84b09d9573eb93737cef72c84a1119a7702a131c' 
  AND token = 'XXC8jjqxgjqoIJUYqd3OG5xchQS2QPBHnpwwyGZlFsU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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