SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13258d4311920d594304f55d4ee4c01b275ae29b2315f4ef4725aea94d7c6ac1' 
  AND token = '+96oDD6sxvlWXSmUj44gIZVGXFINnJNpuTLlGWF+vqU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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