Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd028540a18b632c483a08dee962f267a3d05d3378c354d0739f1a5a6c0be612' 
  AND token = 'Sz+SB6B+0N/EmT5EO4fQvRM7+zpWEW72VfXg1zX+lu4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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