Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49e9134b05284e882469aa2459d3c6a8d9c9bb46908bb3e7a09b1ac72e0496b5' 
  AND token = 'L5FGVbNAB0zW+hBxrKZz7ZsVggC+V9xFl6rsRv+5/ss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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