Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3bdad807ef1b146fe6ef6103d58cd8bd300d288699f24c68ddf68ab97f96530' 
  AND token = 'wfX6zlYC9kWfUuQ/5794JUpxfoMe4jI2rqIgSq+3cIE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}