Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '577cd456601b80285ae75f47dc77b82aedc2e8274fb47ae3fda403f174e3a91d' 
  AND token = 'I4XSZ4NJoWRu1QHyDLzdOVZp5N5vAqoDZjLd4EFvTFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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