Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '737869f393eacf0e4b83e3a93d632d857596b23e39073b30076645e75c75595d' 
  AND token = 'eHnuBtN/N/iZefnzMCRpjSqgM1uFwclMmSf4/CxGsUI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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