Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6abbf100f7e8dd2986dff479afedeb08883b8979043af87674f979e03b7df43' 
  AND token = 'tGA/HqKLHSY3NnmAGA+wX963cDqzNcpvTeMCgkdK9y4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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