Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a2166b8a36cf05537998d46221074bb34d17c38a2e72c973650229a471a86b9' 
  AND token = 'Pg8IA379U8+WIwTZZwaFDZ5EQr62qR1cEsfTpN8coCU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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