Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '517155f84d5e0c4b19b90eb48c1dc372b04ac7b27198a01e6efb2018d1f7180a' 
  AND token = 'y0rHmjMslQxoYJT3+lDL5yHSLGhGisEDpopniajyxeI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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