Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6616f52444a9423e5aee5ad008d6caafa17e46225bc90ede7bb450f8efc95450' 
  AND token = '8p0mXTw6ZzN6FNaoo2dAhLajVOeJCL2wQlWqvU7FM+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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