Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9972ec78aaf9d4840e6d91b399bad2a03999d7ec553b54cf625472cc4220e1cf' 
  AND token = 'yeTUqKFrlH6f0oKjki0TZkEH5wZRFseEgtZwzqY7lIM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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