Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efdd842a0af3655c6c8a78746defc78e80c6b8cc7a3f4bf097ba03e98710d232' 
  AND token = 'zEoI63eWa4yNczwC4JifyKmBYBLQDMXJXyWCjI6CCgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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