SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bf948e7fecb4154557666f87f9d615481ab233ecda24701f16836b9b7e12b046' 
  AND token = 'uWJ8PuIpMy8BAz+BjgwAmR/b2W9plT4x6wure5cbTVE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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