Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bb52ad910f549b54e924fc9c5641a21cb9c3c9f3bac1cd95324f349f490a6d8' 
  AND token = 'byKdHnNOgJx3j0IPNJETN3lBVR1hKK8xaw3NwKkyUnw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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