Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4a1db027f4337ee8abd9b5bd970eda4724c152f9edb5e7e267ea694b1446cb9a' 
  AND token = 'CWkrRNo+3ao4w2LatttRjRAyzmNga3yp2OEdOakQhL8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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