Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37427f99970df27443ee309fdca4b82ef30927d654680539ac173709c66e4e71' 
  AND token = '66VoM3+J5RjgtjtboK9vzflFjbAO1/Go6Dcjfat708w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}