Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4cab90dae91a17f92507b1d0bf01fc19dea1cd469e123ed6136e8a4b0c01b058' 
  AND token = '7P2O/YkF2UKaYDwRfbn00g2XCEIruFQ+mYJGgj7Tdek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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