Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5eb89098ebbae84f7fa7bf2c8c9eee194effbd82a5efb7141ce00ac2c55009ac' 
  AND token = 'Gbz+ZvDFB10JYpbgLc6drrTHhh3iO/ju5FN+pT4OZQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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