Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3e6895cee547a9f550bad4e3072bda5ac3b6c2579ad15966119b98727d4a319' 
  AND token = 'bLYQ3DHNBJeyJbzn5U4rcjlR9YuHtFgql5AyySLvRtQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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