Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e70f9e02f72a60bfdb6eafbff789ed31782040393df6fd58e9ada29dae353d5a' 
  AND token = 'Ilc3AAOWlCnhXMvck4LXE6HSUSrJxDkMeXZp/SzJNcA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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