Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46e8b684f4fcc9c5ee4a5c2deb7e5fc930a033fa05944a4ec15a9c2c61546cf7' 
  AND token = 'hO7aczaHpy7D4dApSpZ52rP/zdzxR9C/yhzAhEi20dQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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