Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3e6346fe6f946aefc4036684d13302545ebd59341287589830f6f97a9187e69' 
  AND token = '+EykLuQj/iFs3FtMjAmqVVTIFfh2P+xqxx8t05gYDDI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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