Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e2840da0e2f9e00b9a54f1627c784a9528290c555ad95d387d6e2477e61f4e8' 
  AND token = 'AtRzqq5EIvA08H+f5hZX9dZ7ycGvvHYxoC5otkMJn/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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