Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5436aae9eb1b1cb44a81ad31cd9ad93f9acd6824dcc5a11486fdb464e45b2320' 
  AND token = 'm0Z2xoGwUWJgJriVRwOwJ2apG7A1Rl56I98JJ/q1mEw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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