Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d05ac57e4dc404149e8cfe8322cab6edbce312136a6bbcf174dc8dcbf3fb79f' 
  AND token = 'qOXnrcbfj79cpVDIYJVeGnW3mPZidpnNYntVB/lmLp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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