Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17fcae4b852a6c6d0ed2b951f2fc7a1035ad8a6188ba4dfd2fcc1e7e20f97ce3' 
  AND token = 'yeFIgv5GujnC2YHsjV3AMJfXGWGAIsw7uE5efZ2+8TE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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