Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb2b92c421db8de1faf8e2ef7b6bf6ff154264abf3bf47674c55c334c7947388' 
  AND token = 'oDF1KeMXSP7eR6cWKlmEFjMwnakDN0W6oNXJVu1n6TU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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