Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aaa9232e044aa9093b293dab740a632b18cc04390aa8991ee2a263707be6386d' 
  AND token = 'McAO8V5VAVvkqlNnKgOWQXpy4tybkORGuP2nd92248g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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