Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '761d9f9c73237390db98c35a9354153c00c77ef61a101fa8a3023023e78283d6' 
  AND token = 'VnMjoTTHTrBOHHfObe55FYsSm71sbsZSTZlWiyJeciY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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