Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2a6538d4739268f22dc2513148ab3b7fe14dcff337012cd8955a62101ef4a60' 
  AND token = 'Q33uIARnrBWJf5c2m2NvLK87icvZ0a47GuYkxYCHEus=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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