SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bb165c7d25d1723e34f8365afb1a3cdd68e66359d751c3ae1d89d97cd4c07a4' 
  AND token = '2uuwcsaCpPqXkGhYkQIjtFnJZjVSH2FwEpKxFIYcBd0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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