Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3966bbf5eeaf8beea18d7f97530e40022748fc36ffb9fbf50636ef6c42c24c5b' 
  AND token = 'HyTYnc4/QwM9gdi46WV8scxCF8zJLr1zrNkv6y1fIDI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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