Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a22cca347c032913a992e6461e7682946597e276fc32799ad80f7e336121fc9a' 
  AND token = '26j3duOU0apiE6rWEefZMya5gwkhEXXNlmdvhLAc0kY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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