Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0ffd0ebd865d4ec9b2cf85e27eaafac1027a64c92710428fe6530d0bcc6b890' 
  AND token = '8baLnfBXjwNrRTvKzL2tzJuUQEuDaRxjLQ22688Pcyk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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