Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b32684cba3bd9c96dac0ebbeafafb1a3b33fe6301d2dc4e2aaa36d82819ff22' 
  AND token = '7P2G+Zodbc1MJnbGq6tjlLFqe2g7yqO4l5u9gBxvuZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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