Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5af5681b26474a6a2898c2c09b6c8cb4b30c353d7b091302b791dd0934df7577' 
  AND token = 'pG+HkzN9ieHxCDyS+xyZc2y8uoDuHnnF4ZZw5IQMD3U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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