SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef01d07b866b04c87d97060bc6294c888f85aa506e5d5cb13c1648502e495042' 
  AND token = 'RjwVd9gGOqkS/P3uUK1jCwszGG+nJmN1Wnq6TBqbQkY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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