Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '153ab7efc1c46c9778a86a73c1fcdbb8a2a6f5798319fe4460b2efaaa4821681' 
  AND token = 'ttj9EqgEQm1yBwYaYose+fA/cMoK1qrhqmDpppjuIJM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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