Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4c53f641e36003f5581ddc7870232ddcfc461a4ac29ef60d8f7e020bd0b0faa' 
  AND token = 'OIga2vO0K8bo+0bgcC9hKjwey5DDvk3ctVPGPMoAeXE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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