Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b602b980623e10508c04b532c8858117e7072ca3b1186c7be09c77c64446458' 
  AND token = '/jdRfP7uQ8nK6aSbm3pWuehdU/SGZLmPqZAw/rIGdrw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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