Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bddad7bc1c2cb3046a17c4891ec4a6d3823c2eca7194974eda73ef3a66f50b40' 
  AND token = '6P2OZfUicFhlXxvCS5EPKodWNi3EhcUzlF4ll9wAQtc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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