SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53ee56508df82efb2acb46e22595d99ee0e5fbb2366af7d5bd8df0679f38f30f' 
  AND token = 'rJyKhH/mJLIvVvfZsELXp2FYXzZenmBePOKhgwDUIgY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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