Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f5099c6f38610a97058b7068d51d95ae0d7033d1dba3e9cb76256a466a7c3c7' 
  AND token = 'xaK+kbJ9brRupNUW2ykWCscfOhvdTpdFf19A+2IHBfs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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