Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '854f328b5240df69a5596549bba45a56c6caf1270715d42bd2974c887a954d10' 
  AND token = 'k4XAoceMDeLeGJQMR8WAVeQNXg/ArKgWlFaaYY4Sdh4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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