Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdbeb922990fb13ed5e871aec150a87f976a2a24dc7cf7bb6297477f88289d88' 
  AND token = 'jTHNmhzR5tF8PW2WaJkXG4a2oVkj8lp40D0fOggs3c4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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