Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '297f12f28e9016536bdda0ae2f51c8e70f1d2724a77066c17abf93c37c8ae45d' 
  AND token = '2UgKcG0ac2dJCt6kEFOEqXLparwQQmfAFexoQODqgKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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