Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eee8dc263063102bd9f2dbf8672dc9e58763cb1ed6b9021ff80d8dd89cf6d58f' 
  AND token = '4QWxjsJEVIDczmpoMQRHlD6/kPxCfSZkJxNP4R+psOA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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