Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73e6f7fb6cdd792fae0638af0291fc46ea8427a2c02e1df151e40e9cea5f8c72' 
  AND token = 'lIIElxssA0Z+5+6hFCCveMHkvFf/p5VvxB/OL15XzpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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