Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd49fb1e284619b30891e05b5f638662d6e47751706554d03afa15c4cd823201' 
  AND token = 'MnFsJHIUc5BrwX6G7kbkD1mEk/+m4AiUQRX1h9oj6/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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