Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3e7693ea5479b640630020a1e9c6899edaf9d3e077c7f1d51d35cba1322103f' 
  AND token = 'cVCzPl6NLH8wL9ea9Xd0Tyjv6h6xhyLE4X0MH2g5BWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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