Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e76b20e61f1076c03951fc704b304c8cd3ac52bae775ea5de45768f5542b3d8c' 
  AND token = 'De3S7/xSNzvvNWWbVJWqrWT5yGNgoSzV23rmOlkAXjA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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