Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad43bbce4a83c724ee27730b96df510f466f23ebd87309b5c7109d5bd7000fea' 
  AND token = '1O5MtybL2gr3u4FXtlkJfu43WJpAVwr8NtsJhnEG0Ls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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