Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2f89501621dfad49d95bad6ed29f94177b15862b433e4c7b3fb7c1ae09acb50' 
  AND token = 'q8/Tp8lJoN4aIUuNill7EHHc6F+9o3YbWW+33cmWwZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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