Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd2446fcfff234c573a6edf6a8a98af0517ac5e1e12ff597b4883a7af4258cd7' 
  AND token = '0RLIPX+gyS3zL/UWRo4G9JUkh4rI04cexb8VPz25tZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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