Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80fa208a8feb2198c1f5fde91c583699f5f1af986ce20d6cf1d26b1554db4c72' 
  AND token = '1cggg6jP59ie5byQi8hINJiZbNEgL6eux0IBFn7t9Bw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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