Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f897afd409d723a9e9876d93806216f9444499c93d829e16cfc26f10f0ee2597' 
  AND token = 'aFCDRRtp4m7GMWoK2bE3mitAzXG6Hp1DEXQBWjwe908=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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