Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e51bb675e42154b58779420f09eff39bdb085c91f1f3e39c594fc63d4205f73' 
  AND token = '3YGHu8s0gCtmt8hN6Jl+uJXuMyGRAu7P/yWy9yiuCzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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