Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '019e9231540de4c60cc3ed7607161b19c7b6e4ceffcdc1e233a6e3b6d4eb2965' 
  AND token = '/qE7U9kLvb4gHLHBDVhBv3eWk3Ak8VVpONmLFW9LRnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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