Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a53e0392ea6486ebbada6f59c8a0e279f3e7a8eb5dd747943b96e53aea24eee' 
  AND token = 'Z4wiqiV5UITYBuAiTEVA1QszcJ3UyA8hvDz6faqPW30=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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