Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac36d4581398578fd3d80fcee25ce59c8a65139d9c257dc3d49435ca8ef67f4e' 
  AND token = 'n+Iia0rERdDXdnEo9HOHx2MJoPDPmrYTqH/xJU975Vo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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