Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '171e103ecedf4e23573c00d32a6689c34dabc91f66e51ebe7d0c8fd6e67ef763' 
  AND token = 'eN2A0vPW5aIfSa5nJfd3bfdlOk3KtF3yvv3+K6rJLWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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