Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0f96013567ff4c70d6dd9e8d837b8cda1a257fc04d77137a3ba7035c993bc69' 
  AND token = 'oYFhQXtOb5itD5Yh59C5PFOFxgaweZzK0f2ZOPVeBiI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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