Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb980911cc8c7cd95da568a85a3db8d273624df0776d4fde70c78785596ad7dc' 
  AND token = '9R/lfVFi/1bCgNbZMPHxW/OkWEGrdwPhebraQKBH8p8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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