Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6bbf81489fd5fb00c22de9b34bb6ca73bb005f1ceb3f06f17afc665656c1fba7' 
  AND token = 'f1l6zifMV4ALEKmbss20pOxiDehhfB8V+4iV19CLTQo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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