SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5079165ef97166f67a4a9e5acfc1e2c8d7e2dd6fb1cd01f58ab5fcd859229f57' 
  AND token = 'zgewaWeeREOFYjxHGsgj0UypIKGKmPWUkX4hVdLwpsw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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