Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aef7267b28a9dedb9fb8b5a2cdc1357f208a7687d01d4bfcde4446c3b32c190d' 
  AND token = 'neJSGklb6gEyq7SynGKpKtCNxmXc3rKNTchxyzoP94k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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