Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8290f28da3f08ab7e48ec2360c70f56fce0834f4786c23646fc150422dfbbe4' 
  AND token = '0I73i3Svd2iKBWuGCwX/uGMtL+oAJYiwy9cTQpEkzOE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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