Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38a2dd80fc5ced392b58bfc7b195ec22f8de79fca673995cc5879c8de11a4ee5' 
  AND token = 'VLvl9JDhvXizQAHziCrKtjNraUXiNFtPuL0MFvckWC4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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