Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4725e72a3be8f1dd99b946e34ec9de4db3e60e07f28a66b21c01185d35599ac0' 
  AND token = 'U7wyQdWsdd1I8i0WCIlP1fys7PM9qtO0+67VWo6XBTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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