Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64b5fed9c22e27027dca9d41a386a89e675820c7464cbf06b56067ee7f2c2062' 
  AND token = 'wJe7IA8qWMZiMsh4MoMAmNSV/bEYKqg4Dl/CPAdbtzw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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