Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c0043898b34b7ba5dc5f8d057f171aa84f97628140682188e93a5cf6d6dd3e7' 
  AND token = 'U9hiotQxKArojGv2G/p28mmhJGytQWM6k4S9AygoI5s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}