Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8fa0d9435b0478afdcde57e0db87553a26347345980e8f82d7365d4a2d6302d9' 
  AND token = 'mSBfXxNC37MhC8oi7z2cw5Im15MtqIK+jFZrkeTI4qM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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