Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '18d0ea5127f8f6441f07e41e4a0322f2e46519943cbba045b07630ee912abd3f' 
  AND token = 'CQu4Zq7nV4epL0L86MrHQksN0SoW19c8w5h75u478DI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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