Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1a232ee1bacdc5c015da99884b66f1a2fe6a8b25c6b8b060b0a9edb051504d3' 
  AND token = '0ebv0Mp9hZpipV7jrqGKCe3edXLjyN8TSs7yByTOoog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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