Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44ede06086dc7dbdb2f2b2056034b1606bc6af57e57d2e8989b4fc3ed07310cf' 
  AND token = 'lwxfKHb+7ZprtyzHmXIu9qFVX+RqEkzC40xUfhXUUdI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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