Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4110fd9cd18ee36d7631c9a46e5c1f2f1bef8090dfc6efe3c6b5dbc24e2ea4f0' 
  AND token = 'FjaV4se+rCcUzn6RJwFFjSuIzbaLYaV1hccKvqgTZk0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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