SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5923d2b5bbf9835df845722b1a75515dca95b305e39f2006770a6a062885a18c' 
  AND token = 'TlZJuNJKO/PU92sX/w6bn0HkHgRYwM2mjKB10jSa3lE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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