Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddf81bdfb6b7809dd97fd8a3ebcf9f9a148ad5974d12bc8c74a6fcde3e88c037' 
  AND token = '9/2g5YBR167lkIpeTpcHfKCg8aWGdybtmLyvr4QkF+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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