Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a602dd8b5386f942261334f79526bb47de538bd50928ca5773564b4e5e4ff249' 
  AND token = 'NSJFIoudeIy94U5yLZVfh/v+VPjWcgbM4E7HU8UOZuA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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