Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c5254097eef30ce8c2546699bdd9117457b7abcd1abb47badd5b9d6b9f93886' 
  AND token = 'p9ybURjYQRseZ6VA9Lsw6cYiXYXR3nimQjcfjO1nWj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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