Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3425a667e07ae4480e345dff404b67ec27e1ac0f063aee71a14b31a126c7dcf' 
  AND token = '6o5jRA0J4OCYZ2qEDfDbzl0tUPFQZv75DsPGsI0M+gk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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