Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4aaa1b42fbbfdd2705758af3cd808d8cbd9e4ae61cb61a8bfcbe4917e5747596' 
  AND token = 'ZlvduwbL6I5xiwZ2wQ73skj6VvvaEj2TZC7cCwwu7dA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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