Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a44b236cdbc13c92b49bd12ffdb3e1e60156e45cc74adacb920215825f45f4dd' 
  AND token = 'RCNkB6Cc/wu9+tHo1jzxch+BTepd0VoFHZIoILtuXak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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