Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dc4334019fbdca059bb6d9ef752d688118a359e68e52671262cfc061acfbe24' 
  AND token = 'zAC/e3FWSF3l1glaXONS9ThbMbtHKmXvGsv3d4VS0Io=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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