Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f8f4fcddbb6f096b54081c215a9703575a3f60c44657b8c3b8335415ffefd8d' 
  AND token = 'A5zJBY5jtmut7Bn8B9UVjJ7j2Nb5S50HpLvngZ2ffxE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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