Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9a48c9dbabe424ce71362f0d87b13d7b77da7137494f2bc2b9bfd45ad3bda85' 
  AND token = '54T5jYLPikUwnq2yqDi5Uj6NFEGJ34JsUFl78ZcvOhM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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